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The type of cells that are absent in this organ are the Schwann cells. So the correct option is A.
What are the Schwann cells?Schwann cells are glial cells that will cover the peripheral nervous system and form myelin sheaths. This will work as an electrical insulator allowing the electrical currents that pass through the neurons not to lose their intensity, producing saltatory conduction.
The myelin sheaths that form the Schwan's cells will be alternated by places where they will not cover, called Ranvier nodules.
These cells will only be found in the peripheral part of the nervous system, since in the central section we will find another type of glial cells called oligodendrocytes, which will have this same function.
Therefore, we can confirm that the type of cells that are absent in this organ are the Schwann cells. So the correct option is A.
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Related Questions
the use of chemical substances to kill pathogenic organisms without injuring the host or the use of a chemical substance to treat various aspects of disease
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Chemotherapy is the process of killing harmful organisms without harming the host.
What does chemotherapy actually do?Chemotherapy is a medical treatment that destroys your body's quickly multiplying cells by using strong chemicals. Chemotherapy is the most popular kind of cancer treatment because cancer cells grow and divide far more swiftly than the bulk of other body cells. There is a large selection of chemotherapeutic drugs.
How serious is chemotherapy?When chemotherapy permanently damages the hearts, lung, kidneys, or reproductive system, for example, the adverse effects can sometimes endure a lifetime. One of the occasionally delayed side effects of various forms of chemotherapy is the development of a second cancer several years after treatment.
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you have before you an unknown organism, which you examine carefully. which of the following would convince you it is a pseudocoelomate?
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To know the organism is pseudocoelomate it should have a bodily cavity that forms between the mesoderm and endoderm during embryonic development.
An creature with a body cavity known as a pseudocoelomate does not have a true coelom, which is where the body cavity originates from. Since the bodily cavity of a pseudocoelomate originates from the blastocoel, or cavity, within the embryo, it is sometimes referred to as a blastocoelomate. A peritoneum that serves as a barrier between the fluid and the bodily cavity lines a real coelom. The bodily fluids bathe the organs in a pseudocoelomate and draw oxygen and nutrients from the cavity fluid. All metazoan species share the condition of having a blastocoel in the embryo. The real coelom is formed when the mesoderm lines the body cavity in most metazoans.
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Which solution would be better to implement? Justify your answer.
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Better phones have aided individuals in numerous activities, including using them for navigation.
How can one navigate a circumstance?transitive formalto handle a challenging circumstance well.No one has my complete confidence in navigating these complex political issues.synonyms and words that are similar.
How do you move through a situation?Observe the bigger picture.As follows:People are considering changing a situation, but they just aren't ready.Preparation: In order to modify a situation, people are arranging and lining up their affairs.Real actions are performed to deal with a novel issue.
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p53 is critical to preventing damage to a genome from being transmitted to next generation. To do this, p53 can control cell division cycle and help repair of DNA damage by controlling gene expression. At the same time, p53 plays central role in inducing cell death. What molecular feature of p53 function, and cellular regulation of p53 activity, enable these different p53 functions in cell division and cell death? (4 pts)
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The molecular feature that allows p53 functions in both cell division and cell death is the ability to regulate the transcription of a battery of genes which includes more than 500 genes in the cell.
What is the p53 transcription factor protein?The p53 transcription factor is a tumor suppressor protein that is able to regulate the cell cycle by activating the expression of other proteins associated with the inhibition of this process.
Moreover, p53 is also able to act as an apoptotic protein by promoting the expression of genes associated with programmed cell death.
Therefore, with this data, we can see that the p53 transcription factor protein is a dual-functional protein that is recognized as a tumor suppressor capable of inhibiting the progression through the cell cycle by activating specific genes and signaling cascades associated with these processes.
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when a typical restriction enzyme cuts a dna molecule, the cuts are staggered so that the dna fragments have single-stranded ends. this is important in recombinant dna work because .
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The DNA cuts are important in recombinant DNA work because the fragments will bond to other fragments with complementary single stranded ends.
DNA Recombination is a process by which the pieces of DNA are broken or separated and then recombined to produce new combinations of alleles. If the process is not controlled properly by the enzymes, the fragments will bind to other fragments with complementary ends. The staggered ends of DNA fragments are known as sticky ends. This process is an important aspect of biotechnology where DNA fragments are separated by gel electrophoresis, studied and them combined with some other pair to get the desired output. It can be done to produce unique genome pairs, vaccines or identify important DNA segments.
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at the genetic level, biological evolution is: at the genetic level, biological evolution is: natural selection. a population change over time. a change in fitness over time. a change in allele frequencies over time. an increase in fitness over time.
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At the genetic level, biological evolution is a change in allele frequencies over time.
What is biological evolution?
In populations of organisms, biological evolution is the change in hereditary features through successive generations. Adaptation is a crucial evolutionary process in which natural selection modifies variance in the fitness of characteristics and species to make them better suited for survival in particular ecological settings. Therefore, understanding the mechanics of evolution requires understanding how developmental changes are mediated.
Model organisms are used frequently to study biological processes. A model organism is a species that is thoroughly researched in the lab with the hope that the findings will be applicable to various biological processes.
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which of the following cell-surface proteins are routinely used to distinguish memory t cells from naive and effector t cells? CCR7CD45ROCD45RAL-selectin (CD62L)
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CCR7 ,CD45RO ,CD45RA, L-selectin (CD62L) are routinely used to distinguish memory T cell from naive and effector T cells
A form of white blood cell. T cells are a part of the immune system and develop from stem cells within the bone marrow. They assist guard the body from infection and might assist fight cancer. additionally called T lymphocyte and thymocyte.
T-cell. Key to the immune device, those cells originate in the bone marrow but mature inside the thymus (the t stands for thymus). T-cells assault other body cells which are infected by a few micro organism, a virulent disease, or any other pathogen. (compare B-cell.)
Effector Cells. relying at the APC a naïve cell comes across it may come to be an effector T cell. ...
Cytotoxic T Cells. Cytotoxic T Cells, also referred to as CD8+ cells, have the primary process to kill toxic/target cells. ...
Helper T Cells.
Regulatory T Cells.
memory T Cells.
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HELP PLEASE!!!!!!!!!!!
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Answer: It's the one to the far left
Explanation: i just know it
Dendrite > branched structure that picks up information
Dendrites are projections of a neuron that receive signals from other neurons.
Neuron > cell that carries information through the nervous system
A neuron, or nerve cell, is an electrically excitable cell that communicates with other cells with connections called synapses.
Axon > receives information and sends it away from the cell
The function of the axon is to transmit information to different neurons, muscles, and glands.
I hope this helps to better understand :)
why can a signaling molecule cause different responses in different cells? view available hint(s)for part a why can a signaling molecule cause different responses in different cells? different cells possess different enzymes, which modify the signaling molecule into different molecules after it has arrived. different cells have membrane receptors that bind to different sides of the signaling molecule. the transduction process is unique to each cell type; to respond to a signal, different cells require only a similar membrane receptor. the transduction pathway in cells has a variable length. all of the above are correct.
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A signaling molecule causes different responses in different cells because c) the transduction process is unique to each cell type; to respond to a signal, different cells require only a similar membrane receptor.
In the field of biology, signaling molecules can be described as the molecules that bind to a receptor of a cell in order for the cell to perform a particular function.
Some of the signaling molecules can be similar for different kinds of cells but cause a different response. This is because there is a different or unique signal transduction pathway for different kinds of cells and through this transduction pathway, a different kind of response is produced. Hence, although the signaling molecule and the receptor might be similar, the response generated through different transduction pathways in different cells will be different.
The question will correctly be written as:
Why can a signaling molecule cause different responses in different cells?
a) different cells possess different enzymes, which modify the signaling molecule into different molecules after it has arrived.
b) different cells have membrane receptors that bind to different sides of the signaling molecule.
c) the transduction process is unique to each cell type; to respond to a signal, different cells require only a similar membrane receptor.
d) the transduction pathway in cells has a variable length.
e) all of the above are correct.
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If two erminate chickens were crossed what is the probable In some chickens, the gene for feather color is controlled by codominance. The allele for black is B and the allele for white is W. The heterozygous phenotype is known as erminette
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If two erminette chickens are crossed, the genotypes of the offspring will be 1/4 BB, 1/2 BW, and 1/4 WW. The phenotypes of the offspring will be 1/4 black, 1/2 erminette, and 1/4 white.
What is an Erminette chicken?
Erminette chickens are a rare breed of chicken originating in France. They are a dual-purpose breed, meaning they are used for both egg production and meat production. They are a small breed, with hens only growing to about 2.5 pounds and roosters about 3.5 pounds. They have a white face, with a white triangle at the top, and a black body. They are also known for their large, bright red combs.
If two erminette chickens are crossed, the resulting offspring will be a 1:2:1 ratio of black, erminette, and white chickens. This means that for every two erminette chickens, there will be one black chicken and one white chicken. This is because erminette chickens are heterozygous, meaning they possess both the B (black) and W (white) alleles. When these chickens are crossed, the B and W alleles are each passed on to one of the offspring, resulting in a 1:2:1 ratio of black, erminette, and white chickens.
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Human influences on the carbon cycle may cause major upsets in the balance of the ecosystem because __________.
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Human influences on the carbon cycle may cause major upsets in the balance of the ecosystem because increasing the anthropogenic carbon dioxide released in the atmosphere may significantly decrease the amount of calcium carbonate in the deep ocean.
All the organisms and the physical setting they interact with make up an ecosystem. The nutrition cycles and energy flows connect these biotic and abiotic elements. Photosynthesis is how energy enters the system and is absorbed by plant tissue.
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after a virus binds to a specific host cell receptor, it enters the cell via either receptor-mediated or by fusion of the viral envelope with the plasma membrane of the target cell.
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The viral penetration phase includes different mechanisms through which the virus can enter the host cell after recognizing the receptors. After a virus binds to a specific host cell receptor, it enters the cell via either receptor-mediated endocytosis or by fusion of the viral envelope with the plasma membrane of the target cell.
How does a virus enter the host cell during penentration phase?
Viruses recognize specific receptors in the membrane of the host cells, where they get attached. These receptors are glycoproteins or lipoproteins that join viral elements and hold them on the host surface.
Once they have recognized their receptor, viruses use different mechanisms to penetrate the host cells.
By injection, by perforating the host cell wall and membrane and injecting the genetic material through a hole. The rest of the virus remains outside the cell. By endocytosis. The virus introduces completely into the host cell by endocytosis of the membrane. Once inside, the virus breaks the vesicle membrane and gets in contact with the cytoplasm. By fusing with the membrane.By going through the pores.After entering the cell, viruses continue their cycle inside the cell.
After a virus binds to a specific host cell receptor, it enters the cell via either receptor-mediated endocytosis or by fusion of the viral envelope with the plasma membrane of the target cell.
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Complete question
After a virus binds to a specific host cell __, it enters the cell via either receptor-mediated ______ or by fusion of the viral envelope with the plasma membrane of the target cell.
Which of these facts could you determine by reading the geologic time scale? Select the two correct answers.
O the life forms that lived in each era
O how old Earth is
O the number of eras in Earth's history
the events that ended major divisions of geologic time
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Answer:
O the life forms that lived in each era
O the number of eras in Earth's history
Explanation:
The geologic time scale is a way to look at Earth's history by dividing time into distinct periods based on the events that occurred. The scale breaks the roughly 4.6 billion years of Earth's history into a series of eras, periods, and eones.
Answer:
Based on the majority of one’s scientific mindset; the age of the earth and the eras which determine the supposed life forms.
B and C
Explanation:
Trick question; the life forms are identified in the presumed eras which are viewed in the various events throughout Earth’s Histroy.
move the terms into the correct empty boxes to complete this concept map that describes the various types of genotypic microbial analyses.
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The two basic kinds of genomic microbial identification techniques are (1) pattern- or fingerprint-based techniques and (2) sequence-based techniques.
Genomic analysis: what is it?Through genotyping, researchers can investigate genetic variations like single nucleotide variations, copy number variations, and significant structural alterations in DNA.
What kinds of genotypes are there?The several genotypes that could exist are AA, AO, BB, BO, AB, and OO. How do the six genotypes relate to blood types .To ascertain whether the A and/or B features are present in a blood sample, a blood test is employed.
What is the genotyping test's underlying theory?Genotyping is the technique of identifying variations in an individual's genetic make-up (genotype) by comparing and analyzing their DNA sequence using biological assays.
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Will a point mutation affect the polypeptide that forms?; Does point mutation change amino acid?; Can point mutations change a specific codon?; How does the mutation affect the amino acid sequence in the polypeptide?
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A single base pair that is inserted, removed, or modified in a genome is known as a point mutation. The majority of point mutations are harmless.
How can point mutations impact the sequences of amino acids?One of three outcomes from a point mutation on a protein is possible: (1) an alteration to a different amino acid known as an amisense mutation a mutation known as a nonsense mutation that affects a termination codon.
What effects does the point mutation have on the polypeptide?A point mutation will frequently result in the same amino acid being included in the resultant polypeptide despite the sequence change because of the degeneracy of the genetic code. Silent mutations are those changes that don't affect the structure of the protein.
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a collection of processes that involves the use of biological systems for altering and, ideally, improving the characteristics of plants, animals, and other forms of life is termed
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Genetic engineering is a technique that employs biological processes to change and enhance traits in plants and animals. It is a group of procedures that enables us to alter the genes of living things.
Genetic engineering is a group of techniques used to change and enhance the traits of plants and animals using biological systems. An organism's genes can be changed via this procedure, which will modify the organism's physical features. For instance, plants that are resistant to pesticides or herbicides can be developed by genetic engineering. Using this method, it is also possible to produce animals with enhanced physical traits like more muscle mass or disease resistance.
A living organism's genes can be changed through genetic engineering in order to change certain traits. This can be accomplished by adding new DNA, as well as by deleting or altering existing DNA.
Some people worry about the possible risks.
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First, you created a POINT mutation in your DNA. Describe what a point mutation is an how this can affect the protein created by the gene.
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A point mutation occurs when a single base in a gene is mutated, and it can have serious consequences, such as the point mutation that causes sickle cell anemia, as well as other physiological effects.
What are the consequences of the point mutation?A point mutation occurs when a single base is mutated, resulting in a different effect on protein shape, as in sickle cell anemia, where the beta chain of hemoglobin is mutated at the 7th position. At that point, glutamic acid is replaced by valine, which has a number of serious physiological consequences due to changed protein structure, including decreased blood flow and the possibility of a heart attack.
Hence, a point mutation occurs when a single base in a gene is mutated, and it can have serious consequences, such as the point mutation that causes sickle cell anemia.
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FILL IN THE BLANK. you step on a sharp object pick up your foot and balanca on the opposite lefg this is blank reflex also known as a ____reflex
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This reflexive response is known as the withdrawal reflex, which is the automatic withholding of a limb from a painful stimulation.
What happens if we step with your left leg on a sharp object?The nerves in your foot, for instance, can convey a pain signal to your brain if you walk on something sharp. Your brain sends a second signal down your spinal cord to the nerves in your leg and foot muscles when it detects danger, instructing them to draw away from the object.
Which four types of reflexes are there?A stretch reflex, Golgi tendon reflex, crossed extensor reflex, and withdrawal reflex are a few examples of the various types of reflexes.
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Transcribed image text: Signaling at a synapse occurs in presynaptic and postsynaptic cells. Sort each of the following events into the proper location. Items (5 items) (Drag and drop into the appropriate area below) Neurotransmitte ris released into the synaptic cleft. Voltage-gated Ca2+ channels open. Reuptake of the neurotransmitter occurs. Ligand-gated ion channels open in response to neurotransmitter Neurotransmitte r binding begins a new action potential. Categories Presynaptic Cell Postsynaptic Cell
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Signaling at a synapse events: Action potential arrives at axon terminal, Voltage-gated calcium channels open, Neurotransmitter released into synaptic cleft ,Neurotransmitter binds to receptors,Graded potential generated in postsynaptic cell and Neurotransmitter is removed from the synaptic cleft
Similar to paracrine signaling, synaptic signaling is separated from it by a unique structure called a synapse in the cell that is sending and receiving the signal. Only cells with synapse connections can communicate synaptically, such as a neuron and the muscle under the influence of brain activity. A chemical neurotransmitter is released by neuron A as a result of an action potential at the connection (synapse) between the two neurons. Neuron B's ability to fire its own action potential might be aided (excited) or hampered (inhibited) by the neurotransmitter.
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The largest moment magnitudes measured to date are from earthquakes that occurred in subduction zones. True/False
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The greatest moment magnitudes observed to date come from earthquakes in subduction zones. This assertion is correct.
Subduction zone earthquakes have produced the greatest moment magnitudes ever recorded. As a comparative unit of measurement, the acceleration caused by gravity is expressed as 1.0 g, or 9.8 meters per second squared (32 feet per second squared).
Subduction zones are when two oceanic plates clash, one of which subducts into the other's interior and the other of which overrides. At subduction zones, the greatest earthquakes ever recorded have occurred.
Deep earthquakes occur at subduction zones when one of the tectonic plates floating on top of the Earth dives under the other and is “subducted” into the mantle.
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g the length of a muscle, when stimulated to contract, will influence the level of force developed. which of the following best explains this phenomenon?
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The muscle's increase active force grows until it reaches its maximum length before falling. The length at which the heart typically beats is at this maximal point.
What happens to the length of a muscle during contraction?For a muscle cell to contract, the sarcomere must shorten. However, the thick and thin filaments that make up sarcomeres do not get any shorter. Instead, they move past each other, shrinking the sarcomere but maintaining the original length of the filaments.
What impact does the muscle fiber's initial length have on the force of contraction?There is a perfect distance between sarcomeres where the tension in the muscle fiber is highest and the force of contraction is greatest. There will be a decrease in contraction tension and strength if sarcomeres are located either closer together or farther apart than this ideal length.
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Which gland is responsible for initiating the menstrual cycle ?
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Every 60 to 120 minutes, it is rhythmically discharged. Follicle stimulating hormone (FSH), which initiates the formation of follicles (eggs) and influences the level of estrogen, the main female hormone, is produced by the pituitary gland when GnRH stimulates it.
Which hormone is identified by a nurse as being the one that starts the menstrual cycle when discussing the hormones involved in it?The anterior pituitary gland secretes the hormones luteinizing and follicle-stimulating.
The menstrual cycle is caused by which hormone?The three phases of the menstrual cycle are follicular (before egg release), ovulatory, and are controlled by a complex interplay of hormones including luteinizing hormone, follicle-stimulating hormone, and estrogen and progesterone (egg release)
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These are twitch graphs for 3 different single muscle fibers. According to this image, what fiber type has more myofibrils/fiber? Fast fatigue-resistant Fast fatigable Slow
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This picture shows Fast fatigable More myofibrils/fiber are present in slow types.
What is myofibril and its function?Sarcomeres, the muscle's functional units, make up myofibrils. The sliding-filament concept is used by the myofibril to produce muscle contraction. While muscle are all at rest, the thick and thin filaments do not completely overlap, with certain regions having neither of the two main types.
What are myofibril and myofilaments?Actin, myosin, and titin are among the lengthy proteins found in myofibrils. Myofilaments. Myofibrils are held together by lengthy proteins that are organized into thin and thick filaments. They are referred to as myofilaments. These occur in segments known called sarcomeres and recur all along length of the myofibrils.
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Please help this is due soon
Answers
Answer: The krebs's cycle, the matrix, citric acid, carbon dioxide, ATP
Explanation:
Cas9 cleaves both strands of the target DNA. Which of the following could occur when cells will try to repair the damage after cleavage by Cas9? (Select all that apply.)
mutations that result in changes to the open reading frame (ORF) of the targeted gene
loss-of-function mutations within the targeted gene
the insertion of a DNA sequence into the targeted gene
no change in the targeted gene
deletions of the targeted gene
Answers
The following options are all valid - Modifications to the targeted gene's open reading frame (ORF) as a result of mutations
- Mutations that cause loss-of-function in the targeted gene
- A DNA sequence is inserted into the desired gene.
- The targeted gene has not changed
- Gene deletions related to the target
A frameshift mutation is a genetic change brought on by an insertion or deletion that changes how the DNA sequence is read.
A frameshift variation happens when nucleotides are added or removed, shifting the grouping and altering the coding for all amino acids downstream. Typically, the protein that results is not useful.
A frameshift mutation results in a complete modification of a protein's amino acid sequence. Because ribosomes read the mRNA strand in terms of codons, or groups of three nucleotides, this modification takes place during translation. The reading frame is a name for these categories.
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The fundamental repeating unit of the myofibril, called a _______, give skeletal muscle its striated appearance and it bordered by ________.
a. cross bridge : Z lines
b. sarcomere : M lines
c. Sarcomere : I bands
d. Sarcomere : Z lines
e. Cross bridge : A bands
Answers
The fundamental repeating unit of the myofibril called a sarcomere, gives skeletal muscle its striated appearance and is bordered by z lines.
The smallest functional unit of striated muscle tissue is called a sarcomere (Greek: sarx, meaning "flesh," and meros, meaning "portion"). In between two Z-lines, it is the repeating unit. Tubular muscle cells, also known as muscle fibers or myofibers, which are generated during embryonic myogenesis make up the skeletal muscles.
The repeating bands of the proteins actin and myosin that are found
along the length of myofibrils give skeletal muscle tissue its striated appearance. Dark Myofibrils are aligned such that A bands and light I bands repeat along them, giving the appearance of a banded or striated pattern throughout the entire cell. The length of the proteins within sarcomeres, which are highly stereotyped and repeated throughout muscle cells, can alter a muscle's overall length.
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T/F: For Metabolic Syndrome, the increase in insulin resistance happens simultaneously with both the increase in secretion of insulin and the elevation of fasting plasma glucose.
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The statement is False, For Metabolic Syndrome, the increase in insulin resistance happens simultaneously with both the increase in secretion of insulin and the elevation of fasting plasma glucose.
A group of risk factors that are particularly related to cardiovascular disease are referred to as the "metabolic syndrome." The chance of getting diabetes, heart disease, stroke, or any combination of the three is significantly increased by metabolic syndrome. The National Heart, Lung, and Blood Institute (NHLBI) believes the following metabolic variables are at play:
• Abdominal fat accumulation. To be eligible, a person's waist circumference must be greater than 40 inches for men and 35 inches for women. The type of obesity with a higher waist circumference is the one that is most closely associated with metabolic syndrome..
• Having a value of 130/80 mm Hg or higher for high blood pressure. The top number, or systolic blood pressure, must be under 120 mm Hg, and the bottom number, or diastolic blood pressure, must be under 80 mm Hg (the bottom number). Blood pressure issues and obesity are directly associated. It's common in people with insulin resistance.
• Lower fasting blood sugar levels. A value of at least 100 mg/dL is indicated by this.
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What type of galaxy is pictured?
Answers
Answer:
I'm guessing the elliptical
if your friend asked you to explain how the structures of the kidneys are involved in the processes of filtration, reabsorption, and secretion, which of the following would you most likely say?
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The part of kidney which is most likely to be involved in filtration, reabsorption, and secretion processes are the renal pyramids.
Blood enter the nephron through the glomerulus. The glomerulus pushes blood cells and proteins into the glomerular capsule. The filtrate flows into the proximal convoluted tubule. Nephrons in the renal pyramids filter blood for the renal artery. Renal pyramids are small structures that contain strings of nephrons and tubules. Humans have an average of seven to eighteen renal pyramids per kidney. The processes of filtration, reabsorption, and secretion ensures that only waste and excess water are removed from the body. Filtration is the process of mass movement of water and solutes from plasma to the renal tubules.
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ap biology adapted from l. miriello by s. sharp compare and contrast asexual and sexual reproduction
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Offspring produced by asexual reproduction are genetically identical to either of their parents.
Two parents contribute genetic material during sexual reproduction to create unique offspring. There are benefits and drawbacks to both sexual and asexual reproduction, which is why some creatures use both.
Sexual reproduction requires both a male and a female organism, as opposed to asexual reproduction, which only involves one organism. Asexual reproduction is used by several unicellular organisms and plants. Fish and most other animals reproduce sexually.
Some creatures, like corals and komodo dragons, have sexual and asexual modes of reproduction. However, as they do not benefit from the genetic variety brought about by sexual reproduction over the long term (over several generations), their capacity to adapt to their environment is compromised.
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