Myelin, a membraneous coating formed by glial cells around axons, acts as an insulator, similar to the insulation around the wires in electrical circuits. This process of "myelination," as it is known, can significantly speed up the transmission of messages between neurons (known as action potentials).
Different glial cell types produce myelin in various ways depending on the location. In the peripheral nervous system (PNS: nerves), Schwann cells produce myelin, and in the central nervous system, oligodendrocytes (CNS: brain and spinal cord). One Schwann cell creates a single myelin sheath in the PNS . The oligodendrocyte, in contrast, sends cell processes to myelinate several segments on numerous axons in the central nervous system. The fundamental myelin sheath organisation and the electrical properties are basically the same between nerve fibres in the PNS and CNS, despite certain molecular or morphological variations.
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What organelle controls what goes in and out of the cell?
there are two active sites in the functional enzyme (one in each subunit), but only one substrate molecule can be processed at a time. why is this? be sure to appropriately cite your source.
The reason why only one substrate molecule can be processed at a time in an enzyme with two active sites is due to a phenomenon called cooperativity.
Cooperativity is a process by which the binding of one substrate molecule to one active site of the enzyme affects the properties of the other active site. In the case of enzymes with two active sites, binding of a substrate molecule to one site results in a conformational change that makes it easier for another substrate molecule to bind to the second active site. However, this conformational change also results in the second active site being less efficient at catalyzing the reaction. Therefore, the overall efficiency of the enzyme is optimized for processing one substrate molecule at a time.
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Why is the relationship between the corals and the algae in the coral reefs considered?
The relationship between the corals and the algae in the coral reefs considered because of mutualism.
Most reef-building corals have photosynthetic cells in their tissues called zooxanthellae. These unique cells and corals have a mutualistic interaction. The coral supplies the zooxanthellae with a safe habitat as well as the substances they require for photosynthesis.
In exchange, the zooxanthellae create oxygen and aid the coral in waste removal. Most significantly, zooxanthellae provide the coral with photosynthetic products such as glucose, glycerol, and amino acids.
These products are used by the coral to manufacture proteins, lipids, carbohydrates, and calcium carbonate. The interaction between zooxanthellae and coral polyps allows for tight nutrient recycling in nutrient-poor tropical environments.
Indeed, up to 90% of the organic material photosynthetically generated by zooxanthellae is transported to host coral tissue. This is the driving factor underlying coral reef development and productivity.
In addition to giving necessary nutrients to corals, zooxanthellae are responsible for the distinctive and stunning hues of many stony corals. When corals are physically disturbed, the polyps eject their zooxanthellae, and the colony becomes stark white.
This is referred to as "coral bleaching" in the industry. Coral bleaching can occur if polyps are left without zooxanthellae for an extended period of time.
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Which underwater ecosystem is made of calcium carbonate structures?
The corals that are principally responsible for establishing the foundations of reef structures and building them up. These reef formation secretes a calcium carbonate structures.
Coral is a member of the Anthozoa class of the Cnidaria animal kingdom, which also contains sea anemones and jellyfish. Corals, unlike sea anemones, develop strong carbonate exoskeletons that support and protect them.
Most reefs thrive in water that is warm, shallow, transparent, bright, and agitated. Coral reefs initially developed 485 million years ago, at the beginning of the Early Ordovician, replacing the Cambrian microbial and sponge reefs.
Shallow coral reefs, often known as sea rainforests are home to some of the most varied ecosystems on the planet. They cover less than 0.1% of the world's ocean surface, or around half the size of France, yet they support at least 25% of all marine species, including fish, mollusks, worms, crabs, echinoderms, sponges, tunicates, and other cnidarians.
Coral reefs thrive in nutrient-depleted ocean conditions. They are most typically found at shallow depths in tropical oceans, however deep water and cold water coral reefs can be found on lesser sizes elsewhere.
Coral reefs have declined by 50% since 1950, partly because they are sensitive to water conditions. They are under threat from excess nutrients (nitrogen and phosphorus), rising ocean heat content and acidification, overfishing (e.g., from blast fishing, cyanide fishing, spearfishing on scuba), sunscreen use, and harmful land-use practices, including runoff and seeps (e.g., from injection wells and cesspools).
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Answer:
Coral Reefs
Explanation:
Correct one edge 2023
Fill in the blank.
In the CNS, _____ are cells that line the fluid-filled cavities and which produce, transport, and circulate the fluid surrounding the brain and spinal cord.
Ependymal cells are the cells that border the cavities of a central nervous system in brain . An example of a neuroglia as well as glial cell is the ependymal cell.
The lining of the brain or spinal cord cavities is made up of nonnervous ependymal cells, which develop from the basic neural ectoderm. They're frequently grouped with neuroglia. The primary source of CSF, that mostly fills the ventricles, spinal canal, and subarachnoid regions, is the choroid plexus epithelial cells. Ependymal cells are a specific kind of neurological support cell that line the spinal cord's central canal and the ventricles in the brain. Ependymal cells, which line the spinal canal and the ventricles filled with CSF, are crucial to the creation and control of CSF.
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what artery branches off the subclavian arteries?
arteries that branch off the subclavian arteries, such as the thyrocervical trunk, which supplies blood to the thyroid gland and certain muscles in the neck and shoulders, and the costocervical trunk, which supplies blood to the upper back and neck.
The subclavian arteries are a pair of major arteries in the human body that supply blood to the arms, neck, and head. Several arteries branch off the subclavian arteries as they travel through the body.
One important artery that branches off the subclavian arteries is the vertebral artery. The vertebral artery is a pair of arteries that run up the back of the neck and supply blood to the spinal cord, brainstem, and cerebellum. Another important artery that branches off the subclavian arteries is the internal thoracic artery (also known as the internal mammary artery). The internal thoracic artery runs down the front of the chest and supplies blood to the chest wall, including the ribcage and breastbone.
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solutions among african-americans, the frequency of sickle-cell anemia (which, as you will recall is a homozygous recessive condition) is about 0.0025. what is the frequency of heterozygotes? when on african-american marries another, what is the probability that both will be heterozygotes? if both are heterozygotes, what is the probability that their first child will have sickle-cell anemia?
If the frequency of sickle-cell anemia in African-Americans is 0.0025, then we can calculate the frequency of the recessive allele (s) using the Hardy-Weinberg equation: [tex]p^{2}[/tex] + 2pq + [tex]q^{2}[/tex] = 1
where p and q are the frequencies of the dominant (HbA) and
recessive (s) alleles, respectively. Since sickle-cell anemia is a homozygous recessive condition, [tex]q^{2}[/tex] represents the frequency of affected individuals (0.0025), so:
[tex]q^{2}[/tex] = 0.0025
q = sqrt(0.0025) = 0.05
The frequency of the HbA allele can be calculated as:
p = 1 - q = 1 - 0.05 = 0.95
To calculate the frequency of heterozygotes (HbAS), we use the 2pq term of the Hardy-Weinberg equation:
2pq = 2 x 0.95 x 0.05 = 0.095
So the frequency of HbAS is 0.095, or about 1 in 11 African-Americans.
When an African-American marries another, the probability that both will be heterozygotes (HbAS) can be calculated using the product rule of probability:
P(HbAS for individual 1) x P(HbAS for individual 2) = 0.095 x 0.095 = 0.009025
So the probability that both individuals are HbAS is 0.009025, or about 1 in 111.
If both individuals are HbAS, the probability that their first child will have sickle-cell anemia (HbSS) is 1 in 4, or 0.25. This is because each parent has a 1 in 2 chance of passing on the recessive allele, and the child must inherit two copies of the recessive allele to have the condition. The probability that the child will be HbAS is also 1 in 2, and the probability that the child will be HbAA (without the sickle-cell allele) is also 1 in 2.
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Cat-like eyes (E) are dominant to round eyes (e). Cross a mom monster with round eyes with a dad monster who has homozygous alleles for cat eyes.
50% of the offspring would inherit one dominant and one recessive allele (Ee) and have cat-like eyes
define offsprings ?
Offspring refers to the young or progeny of an organism produced by sexual or asexual reproduction. They inherit genetic material from their parents, determining their physical and behavioral traits. The term is commonly used to refer to the offspring of animals, but it can also apply to plants and other organisms.
Assuming that both the mom monster and dad monster are hybrids (heterozygous) for the eye shape gene:
The mom monster would have the genotype Ee (one dominant allele and one recessive allele)
The dad monster would have the genotype EE (two dominant alleles)
Using a Punnett square to cross these two monsters would result in the following offspring:
E e
E EE Ee
e Ee ee
50% of the offspring would inherit one dominant and one recessive allele (Ee) and have cat-like eyes
50% of the offspring would inherit two recessive alleles (ee) and have round eyes
All of the offspring would inherit one allele from each parent. Since the dominant cat-like eye allele (E) is present in the dad monster, and it only takes one copy of the dominant allele to express the trait, half of the offspring will have cat-like eyes.
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match the items. the task is to match the lettered items with the correct numbered items. appearing below is a list of lettered items. following that is a list of numbered items. each numbered item is followed by a drop-down. select the letter in the drop down that best matches the numbered item with the lettered alternatives. a. mitochondrial matrix b. oxygen c. mitochondrial inner membrane d. glycolysis e. 1 f. oxidative phosphorylation g. water h. cell membrane i. substrate-level phosphorylation j. 3 k. cytoplasm l. 4
Matching the items to the correct number list a. mitochondrial matrix b. oxygen c. mitochondrial inner membrane d. glycolysis e. 1 f. oxidative phosphorylation g. water h. cell membrane.
Substrate-level phosphorylation occurs in the cytoplasm of cells (glycolysis) and in the mitochondria (Krebs cycle). .
So. substrate level-mitochondrial inner membrane
Substrate-level phosphorylation is a metabolism reaction that results in the production of ATP or GTP by the transfer of a phosphate group from a substrate directly to ADP or GDP. Transferring from a higher energy (whether phosphate group attached or not) into a lower energy product.
The cytosol contains dissolved nutrients, helps break down waste products, and moves material around the cell. The nucleus often flows with the cytoplasm changing its shape as it moves. Cytosol is known as the matrix of the cytoplasm. It surrounds the cell organelles in eukaryotes.
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represents a metabolic process involving the regulation of lactose metabolism by E. coli bacteria. Lactose is utilized for energy by E coll when glucose is not present. Allolactose is an isomer of lactose that is in the environment of these bacteria when lactose is present. The CAP site prevents the binding of RNA polymerase when glucose is present in the environment. The lacZ, lacY, and lac A genes code for proteins needed for lactose metabolism.
The scientific claim that is consistent with the information provided in the figure 1 is allolactose acts as an inducer that binds to the operator, allowing E. coli to metabolize lactose. Therefore, the correct option is D.
What is lactose metabolism?It is also referred to as lactose degradation, where breakdown of alpha lactose to constituent sugars take place, thereby producing energy.
The figure shows that the lac operon is regulated by a repressor protein and an activator protein (CAP) in response to the presence of lactose and glucose in the environment. When lactose is present, it is converted to allolactose which binds to the repressor protein and prevents it from binding to the operator, allowing RNA polymerase to transcribe the genes involved in lactose metabolism.
This process is known as induction, and it enables E. coli to use lactose as an energy source when glucose is not available. Therefore, the correct option is D.
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The question is incomplete, but most probably the complete question is,
Figure 1 represents a metabolic process involving the regulation of lactose metabolism by E. coli bacteria. Lactose is utilized for energy by E coll when glucose is not present. Allolactose is an isomer of lactose that is in the environment of these bacteria when lactose is present. The CAP site prevents the binding of RNA polymerase when glucose is present in the environment. The lacZ, lacY, and lac A genes code for proteins needed for lactose metabolism.
Which is the scientific claim that is consistent with the information provided in the figure 1.
a. The presence of excess lactose blocks the functioning of RNA polymerase in this operon.
b. When bound to the operator, the repressor protein prevents lactose metabolism in E. coli.
c. The binding of the repressor protein to the operator enables E. coli to metabolize lactose.
d. Allolactose acts as an inducer that binds to the operator, allowing E. coli to metabolize lactose.
When a boxer is moving away from a punch the force experienced is reduced?
the duration of contact is extended The force felt by a boxer as they move away from a blow is lessened since the punch has more time to make contact with them.
Impulse is the result of the force as well as the moment of application, and this notion explain why "rolling with both the punches" in boxing is effective. Since force is inverse proportional to time, when he moves his head forward the time increases and as a result the impact of force decreases. As a result, the boxer hits a very little bit less forcefully. A. It lengthens the impact period while lessening the force of the hit. The moment of impact and force are decreased when the boxer travels towards the strike.
(When a boxer is moving away from a punch, the force experienced is reduced because
A) momentum transfer is reduced.
B) the time of contact is increased.
C) the force is less effective.
D) all of the above)
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the difference between homeostasis and steady state is... a. homeostasis occurs during exercise and steady state exists at rest b. there is no difference between the two c. homeostasis occurs at rest, while steady state occurs during exercise d. homeostasis describes how to body responds to exercise to establish steady state
Homeostasis and steady state are two related but distinct concepts in biology that refer to the ability of living organisms to maintain stable internal conditions despite changes in the external environment. So option. d is correct.
Homeostasis refers to the active process by which an organism maintains a constant internal environment, despite fluctuations in the external environment. This can involve a wide range of physiological processes, such as regulating body temperature, controlling blood sugar levels, and maintaining fluid balance. Homeostasis is essential for the survival of organisms, as it helps to maintain the conditions necessary for proper cellular function and health.
Steady state, on the other hand, refers to a condition in which the internal environment of an organism remains constant over time, even in the presence of ongoing external changes. In other words, steady state is a state of balance or equilibrium that is maintained over time, rather than an active process of regulation like homeostasis.
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with independent assortment, how many different types of gametes are possible from the genotype k/k, l/l, m/m, p/p and in what proportions are they expected?
with independent assortment each gene is 1/2 chance, so 4(1/2) = 1/16. 16 possible combinations, 1/16 chance of getting any one of them.
Mendel's law of independent assortment states that the alleles of two (or more) different genes get sorted into gametes independently of one another. In other words, the allele a gamete receives for one gene does not influence the allele received for another gene. According to the law of independent assortment, during the inheritance of two different traits, the alleles of both the traits assort and are inherited independently of one another during gamete formation.
Independent assortment occurs spontaneously when alleles of at least two genes are assorted independently into gametes. Consequently, the allele inherited by one gamete does not affect the allele inherited by other gametes. Mendel noted that the transmission of different genes appeared to be independent events. This gives both the trait equal chances of being inherited. Each gene is 1/2 chance, so 4(1/2) = 1/16. 16 possible combinations, 1/16 chance of getting any one of them.
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the first level of gene regulation occurs along the chromosome, through chemical modifications of the dna or histones. how do these chemical modifications cause changes in gene expression? select all that apply.
Option 4 is correct. The chemical changes to histone could change the structure of the chromatin and affect RNA polymerase's capacity to bind to DNA.
Enzymes that alter histone through chemical modification could be activated by the chemical treatment to DNA.
Epigenetic ("around genetics") regulation is the initial level of gene expression control. A relatively new but expanding area of biology is epigenetics. Gene changes under epigenetic control are transient and do not affect the DNA's nucleotide sequence. control of transcription (whether and how much a gene is transcribed into mRNA) translational management (whether and how much an mRNA is translated into protein) regulation of translation (whether the protein is in an active or inactive form, and whether the protein is stable or degraded)
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Complete Question-
The first level of gene regulation occurs along the chromosome, through chemical modifications of the DNA or histones. How do these chemical modifications cause changes in gene expression? Select all that apply
The chemical modification to histones could alter chromatin structure and affect the ability of RNA polymerase to bind to DNA The chemical modifications to DNA could activate enzymes that add chemical modifications to histones. The chemical modifications to DNA could prevent the removal of introns from the mRNAA and b b and cOne way to control bacterial growth is by subjecting the bacteria to high temperatures during a process known as ____.
One way to control bacterial growth is by subjecting the bacteria to high temperatures during a process known as pasteurization.
Pasteurization is a heat treatment process that is used to kill or inactivate harmful bacteria and other microorganisms in food and beverages. This process typically involves heating the product to a specific temperature for a certain period of time, and then rapidly cooling it.
Pasteurization is commonly used in the dairy industry to ensure that milk and other dairy products are safe for consumption, but it is also used in the production of other food and beverage products, such as fruit juices, beer, and wine.
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The Mohorovicic discontinuity is the __________.
A) division between the lithosphere and asthenosphere
B) boundary between solid and molten rock
C) transition from granitic to basaltic crust
D) boundary between outer core and inner core
E) boundary where crust gives way to mantle
The line between the crust and mantle is known as the Mohorovicic Discontinuity, abbreviated Moho. This barrier is situated at a depth of the Earth's surface of about 2891 kilometres.
The boundary between both the crust and the mantle is currently known as the Mohorovii discontinuity, sometimes referred to as the Moho. It is a distinct leap in seismic wave velocity. As you are surely aware, the earth's surface and mantle are separated by the Mohorovicic Discontinuity. It would be constructed of many elements, including oxygen, iron, sodium, silicon, & aluminium. Rocks that make it up the Earth's crust & mantle would contain these elements.
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ANSWER QUICK!!
What is the interaction between bicarbonate and hydrogen ions in the buffer system?
In the buffer system, bicarbonate and hydrogen ions interact in a dynamic equilibrium.
What is a buffer system?
A buffer system is a solution used to maintain a relatively constant pH level in a solution. It is composed of a weak acid or base and its salt. The system works by releasing or absorbing hydrogen ions as needed to counteract any changes in pH, thus keeping the solution at a relatively constant pH.
When the concentration of hydrogen ions increases, the bicarbonate molecules react with them to form carbonic acid, which breaks down into water and carbon dioxide. At the same time, the carbon dioxide reacts with water to form carbonic acid, which then breaks down into bicarbonate and hydrogen ions, thus restoring the equilibrium. This process helps to maintain the pH of a solution by keeping the concentration of hydrogen ions relatively stable.
Therefore, bicarbonate and hydrogen ions interact in a dynamic equilibrium in the buffer system.
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True or False? despite their adaptations to land, most species of plant are still aquatic.
False, despite their adaptations to land, most species of plant are still aquatic.
Four major adaptations are found in all terrestrial plants: the alternation of generations, a sporangium in which the spores are formed, a gametangium that produces haploid cells, and apical meristem tissue in roots and shoots. Adaptations are many and varied. Many aquatic flowing plants have leaves that lie flat on the water for maximum sunlight collection. The stems of many aquatic plant have large air-filled areas to increase buoyancy. Many fruits of aquatic plants float on water, which increases dispersal as fruits and seeds float away. Seeds, stomata, waxy cuticles, and vascular transport all evolved to reduce water loss and circulate water to all areas of the plant. Water loss and circulation were not an issue before the transition to land; plants were forced to adapt these traits in order to survive in a terrestrial environment.
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A certain cell no longer needs a particular protein in its development.
How does the cell stop production of the protein?
a) by using vesicles to transport excess protein from the cell
b) by recruiting enzymes to break down any additional protein produced
c) by breaking down the segments of DNA containing the gene for that protein
d) by repressing transcription and translation of the gene for the protein
Answer: The answer is *D*
Explanation: Took the quiz :)
By repressing transcription and translation of the gene for the protein the cell stop production of the protein.
What is Protein?The body is made up of protein, which may be found in almost every organ, tissue, and body part, including muscle, bone, skin, and hair. It contributes to the production of hemoglobin, which transports oxygen in the blood, and enzymes, which drive numerous chemical reactions.
You are made up of at least 10,000 distinct proteins, which also keep you that way. Twenty-plus fundamental building blocks known as amino acids are used to create protein.
The essential amino acids, also known as histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine, must be obtained from diet.
Therefore, By repressing transcription and translation of the gene for the protein the cell stop production of the protein.
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1. Which defensive strategy makes the insect hard to see?
Venom Glands
Aposematic Coloration
Crypsis
Batesian Mimicry
Crypsis is a defensive strategy that obscures an insect's vision.
The bug accomplishes this by using camouflage, which is the skill of being able to blend into one's surroundings through the use of colours, forms, and patterns.
For instance, a leaf-imitating bug may have hues, patterns, and forms that are similar to leaves, making it challenging to tell it apart from its surroundings.
In order to disrupt their shape and make themselves more difficult to discern, insects may also adopt disruptive colouring, which entails having various colours on different areas of their bodies.
Crypsis is an extremely efficient defence tactic because it allows an insect to avoid being spotted by predators.
Complete Question:
Which defensive strategy makes the insect hard to see?
Venom Glands
Aposematic Coloration
Crypsis
Batesian Mimicry
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A nerve fiber is a long __ elongated process usually an axon in the peripheral process?
Usually an axon in the peripheral process, a nerve fibre is a single long, elongated process.
Is the axon of a nerve fibre long?In vertebrates, a nerve cell, or neuron, has a long, slender projection called an axon that normally carries electrical impulses known as action potentials away from the nerve cell body. (See spelling variations.) A huge process known as an axon, which originates from the cell body at a location known as the axon hillock, is responsible for transmitting information.
What is a neuron's extended extension?A nerve cell's long, hair-like axons, which transmit messages to other nerve cells, are known as axons. Dendrites are cytoplasmic extensions that resemble threads in a neuron.
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why does skeletal muscle use more energy per unit time than smooth muscle? choose all correct answers. group of answer choices the myosin atpase is faster more calcium is cycled across the sarcoplasmic reticulum skeletal muscle has lower concentrations of na /k atpase skeletal muscle can contract and relax more quickly
Skeletal muscle use more energy per unit time than smooth muscle because the myosin ATPase is faster and Skeletal muscle can contract and relax more quickly. Option A and D is correct.
Skeletal muscle uses more energy per unit time than smooth muscle due to the faster myosin ATPase, which allows for more rapid cycling of the myosin heads and faster contraction and relaxation of the muscle fibers. Additionally, skeletal muscle fibers are capable of more rapid and forceful contractions than smooth muscle, which also contributes to their higher energy demand.
The concentration of Na/K ATPase and the cycling of calcium across the sarcoplasmic reticulum are not major factors that contribute to the higher energy demand of skeletal muscle compared to smooth muscle. Na/K ATPase is primarily involved in maintaining the resting membrane potential of cells and is not directly involved in muscle contraction.
While calcium cycling is important for muscle contraction, the amount of calcium cycled across the sarcoplasmic reticulum is similar in skeletal and smooth muscle, and therefore is not a major contributor to the higher energy demand of skeletal muscle.
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--The given question is incomplete, the complete question is
"Why does skeletal muscle use more energy per unit time than smooth muscle? choose all correct answers. group of answer choices A) the myosin ATPase is faster B) more calcium is cycled across the sarcoplasmic reticulum C) skeletal muscle has lower concentrations of Na+/K+ ATPase D) skeletal muscle can contract and relax more quickly"--
Which example is an internal stimulus
An example of internal stimuli is your vital signs changing due to a change in the body.
What do you mean by internal stimulus?An internal stimulus is the one which arises within the body. Examples of internal stimulus include hunger, thirst, and emotional states. Internal stimuli are factors located inside the body that are detected and cause a response.
For example one of the internal stimuli is hunger which is the sign of low energy in the body. It stimulates us to eat something to regain the needed energy. Blood Pressure: Blood pressure is an internal stimulus of mammals that is measured by receptors in arteries.
Autonomic or spontaneous movements are of three types in plants – variation movements, curvature and growing movement and locomotion movement. This type of plant movement is due to internal stimulus and is relatively independent of external factors.
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Answer:
Explanation:
An example of internal stimuli is your vital signs changing due to a change in the body.
what do you call to the ability to move a body part through full range of motion at a joint?
Flexibility is the ability of your joints to move through their full range of motion without any pain or stiffness.
There are 2 types of stretching - isometric and dynamic.
Isometric stretching can be defined as the kind of stretching where increases strength and flexibility.
whereas, the Dynamic stretching is when you take a particular part and the you allows the joints and muscles to move through their full range of motion.
flexibility is much needed in life because, this kind of movement potential during daily activities, sports, and exercise help in increasing stamina and also for the greater range of motion during activities.
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nondisjunction that leads to problems in offspring can occur in _____.
Nondisjunction that causes problems in offspring can occur in meiosis I and II. As a result of nondisjunction, the chromatids do not separate, hence, one cell acquires both chromatids and other cell no chromatids.
Where does nondisjunction occur?Nondisjunction, in which the chromosomes do not segregate evenly, can occur in meiosis I (layer 1), meiosis II (layer 2), and mitosis (layer 3). These unequal divisions can produce daughter cells with unexpected chromosome numbers called aneuploids.
What happens when nondisjunction occurs?When nondisjunction occurs, the chromatids do not separate. As a result, one cell acquires both chromatids and the other cell acquires no chromatids. Upon completion of mitosis, each daughter cell has an abnormal number of chromosomes. One cell has an extra chromosome and the other cell has no chromosome
What are main types of nondisjunction?There are three types of nondisjunction: Failure to separate homologous chromosome pairs at meiosis I, failure to separate sister chromatids at meiosis II, and failure to separate sister chromatids at mitosis. Nondisjunction results in daughter cells with abnormal chromosome numbers (aneuploidy).
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Which of these carbohydrates may contain glucose as well as other monosaccharides?a. fiber b. amylopectin c. glycogen d. amylose
Option a is correct. Carbohydrates, which may include glucose and other monosaccharides, are dietary fiber.
What are examples of carbohydrate monosaccharides?Monosaccharides are a type of carbohydrate that cannot be hydrogenated into smaller carbohydrates. They correspond to general chemical formula (CH2O)x. The most common monosaccharides contain 3-6 carbon atoms in an unbranched, single-bonded chain. Monosaccharides are denoted with the suffix -ose. Examples of monosaccharides include: Glucose, fructose, and galactose.
What is the function of monosaccharides in carbohydrates?Monosaccharides perform two main functions in the body: Essential component of energy storage and more complex carbohydrates used as structural components.
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What did Gregor Mendel control in his experiments with pea plants?
Gregor Mendel control in his experiments with pea plants is the traits of the pea plants.
Gregor Mendel chose to study pea plants because they have easily identifiable traits, such as height, seed shape, and flower color. He controlled these traits by cross-pollinating the plants and carefully tracking the inheritance of these traits through several generations.
For example, Mendel would cross-pollinate a tall pea plant with a short pea plant, and then observe the traits of the offspring. He would then cross-pollinate the offspring with each other, and continue to track the inheritance of the height trait through several generations.
Through his experiments, Mendel was able to identify the principles of inheritance, including the concepts of dominant and recessive traits, and the law of segregation. His work laid the foundation for the field of genetics and our understanding of how traits are passed down from one generation to the next.
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The idealized conditions necessary for a population to achieve rmax include:_________
The prerequisites for rmax are food and water, the lack of predators or adequate predator management, as well as suitable meteorological and climatic circumstances.
What is rmax?The highest rate of population expansion a species can experience under ideal environmental conditions is known as Rmax, also known as the intrinsic rate of natural increase. It is estimated as the difference between the birth rate and the mortality rate and serves as a gauge of a population's capacity for reproduction. When the population is expanding at its fastest pace, rmax is the value of r in the exponential growth model (dN/dt = rN). The value of rmax differs between species and is determined by things like longevity, environmental conditions, reproductive rate, and age at first reproduction. Understanding rmax is crucial for forecasting population growth and behaviour, determining the likelihood of population decreases or extinctions, and creating successful conservation plans.
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When a red blood cell is placed in a hypertonic (very concentrated) solution of NaCL
-sodium ions rush into the cell, down the concentration gradient
-sodium rush out of the cell, down the concentration gradient
-sodium ions may leave the cell, but are all pumped back in by Na/K-atpase pump
-sodium ions may enter the cell, but are pumped out by Na/K ATPase pump
When a red blood cell is placed in a hypertonic solution of NaCl, sodium ions rush out of the cell, down the concentration gradient.
This is because the hypertonic solution has a higher concentration of solutes, including sodium ions, than the red blood cell. As a result, water will also move out of the red blood cell, causing it to shrink and become dehydrated. The Na/K ATPase pump may work to pump sodium ions back into the cell, but it will not be able to keep up with the rate at which they are leaving due to the hypertonic solution. Therefore, the correct answer is "sodium ions rush out of the cell, down the concentration gradient."Similarly, the statement "sodium ions rush out of the cell, down the concentration gradient" is also incorrect, as the concentration gradient of sodium ions is actually in the opposite direction, from outside to inside the cell in this scenario.
The statement "sodium ions may leave the cell, but are all pumped back in by Na/K ATPase pump" is also incorrect, as in a hypertonic solution, the concentration gradient of sodium ions is from outside to inside the cell, and the pump works to remove excess sodium ions from the cell.
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the blueprints for creating a human are stored and communicated in our , which determine(s) the nature and function of every cell in the human body. a)zygote b)genes c)chromosomes d)dna
The blueprints for creating a human are stored and communicated in our option C: chromosomes, which determine the nature and function of every cell in the body.
Your genes, which are stored on your chromosomes, are the blueprint for your body. A copy of this blueprint is present in almost every cell in the human body; it is typically kept in the nucleus, an unique sac within the cell. Long strands of a molecule called deoxyribonucleic acid (DNA) make up chromosomes.
Genes are the hereditary unit of life. They get transferred from one generation to another, through a process called heredity. Genes are always present in pairs on the long, spiral molecules called chromosomes. Chromosomes, along with the genes, make up the DNA.
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