Blood-Brain Barrier prevent material from moving in or out of the brain's capillaries.
What is blood-brain barrier?
All of the body's tissues and organs depend on blood arteries to carry oxygen and nutrients to them. The blood-brain barrier, a special property of the blood arteries that vascularize the central nervous system (CNS), enables these vessels to tightly control the transit of ions, chemicals, and cells between the blood and the brain. Correct neuronal function is enabled by the careful regulation of CNS homeostasis, which also safeguards neural tissue from toxins and infections. Alterations to these barrier qualities play a significant role in the pathophysiology and development of various neurological illnesses.Learn more about the blood brain barrier with the help of the given link:
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what can be stated for a particular element if only the group number of 14 is known
A. The element has 14 neutrons
B.the element has 4 valence electrons
C. The element has 4 electrons
D. The element has 14 protons
Answer:
B
Explanation:
Group numbers can be used to figure out valence electrons. From groups 13-18 you subtract 10 from those group numbers to find the valence electrons. So in this case we're dealing with group 14. So 14-10=4. So we have 4 valence electrons.
In the given case, it can be concluded that the element has 4 valence electrons. The correct option is B.
What is an element?A genuine element is defined in chemistry as a material whose atoms all (however almost all) have the same atomic number, or number of protons.
Nuclear scientists, on the other hand, define a pure element as one that has only one stable isotope.
A chemical element is a type of atom with a specific number of protons in its nucleus, which would include the pure substance made up entirely of that species.
Chemical elements, unlike chemical compounds, cannot be broken down into simpler substances by any chemical reaction.
Valence electrons are electrons in an atom's outermost shell, or energy level. In the given case, the element has group number 14 which indicates that this is having 4 valance electrons.
Thus, the correct option is B.
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The increased concentration of an element in an aquatic organism relative to the water it lives in acquired over its life is called:_______
The increased concentration of an element in an aquatic organism relative to the water it lives in acquired over its life is called bioaccumulation.
When an organism absorbs a material more quickly than it is shed or removed by catabolism and excretion, this is known as bioaccumulation. Therefore, even if environmental levels of the toxin are not extremely high, the danger of chronic poisoning increases with the biological half-life of a toxic chemical.
Bioaccumulation is the process by which DDT builds up in fish bodies once it enters aquatic environments. The concentration of DDT rises with each subsequent trophic level when fish are consumed by higher trophic level animals; this process is known as biomagnification.
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In an experiment, 90 newborn flies are divided evenly into three separate
groups and placed in boxes inside an incubator that is maintained at a
constant temperature of 30°C. On a daily basis, the first group is given water
containing 1 mg/mL of sugar; the second is given water containing 2 mg/mL
of sugar; and the third is given water containing 3 mg/mL of sugar. After four
weeks, the average length of the flies in each group is determined.
Which factor is the dependent variable in this experiment?
A. Average length of flies in a group
B. Concentration of sugar in the water
C. Number of flies in a group
D. Temperature of the incubator
Answer:
A. average length of files in a goup
A failure of the cardiovascular system to keep an adequate supply of blood circulating to the vital organs of the body is known as _____________.
Shock is a condition in which the body's circulatory system fails to maintain a sufficient flow of blood to its important organs.
What is "shock" & how can one identify it?
Shock is a serious medical illness caused by an abrupt decrease in blood flow to the body. Because of inadequate blood flow maintained by the circulatory system, essential organs receive much less oxygen and nutrients. Additionally, it weakens the kidneys, which limits the body's ability to eliminate waste. Numerous factors, such as insufficient blood volume and insufficient cardiac blood flow, can contribute to shock. Shock is characterized by low blood pressure (hypotension), excessive breathing (hyperventilation), a weak, quick pulse, clammy, grayish-blue skin (cyanosis), reduced urine output (oliguria), extreme worry and dread, bewilderment, and occasional hostility.Learn more about shock here:
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The correct sequence of sperm-transporting tubules that transport spermatozoa to the epididymis is the?
Correct sequence of sperm-transporting tubules that transport spermatozoa to the epididymis is Seminiferous Tubules---> Rete Testis---> Vasa Efferentia----> Epididymis
Spermatozoa is the sperm that is formed from a spermatid after Spermiogenesis. It is released into the lumen of seminiferous tubules.
Seminiferous Tubules is present in the testis of human body.
Sperm transporting tubules are:
Seminiferous TubulesRete testisVasa EfferentiaEpididymisThe sperm passes through the seminiferous tubule into Rete testis.
Rete testis is a network of tubules that form a link between seminiferous tubule and Vasa Efferentia.
Vasa Efferentia connects Rete testis to Epididymis. It makes a pathway for the sperm transportation.
Epididymis is the region where the transported sperm from Vasa Efferentia reach. It stores the sperm until they are functionally matured enough to carry out the fertilisation in the human female body.
Hence, the pathway is Seminiferous Tubules---> Rete Testis---> Vasa Efferentia----> Epididymis
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An action potential traveling along the entire length of an axon demonstrates ________ propagation.
An action potential traveling along the entire length of an axon demonstrates continuous propagation.
Propagation of action potential:
An action potential is created by the rapid input of Na+ ions and the slightly slower outflow of K+ ions. Action potential initiation occurs in the axon's first segment, and as action potentials spread throughout the axon, cells can convey their output to synapses located further distant from the cell. The action potential conducts continuously in unmyelinated axons, whereas it conducts rapidly and saltatorily in myelinated axons where sodium channels are concentrated near the nodes of Ranvier.The action potential always advances in the same direction whenever a local current begins to form due to the prior axon segment still being in the absolute refractory period. As a result, action potentials travel away from the location of their generation and do not change course.Learn more about the Action potential with the help of the given link:
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What layer of blood vessels is responsible for vasodilation and vasoconstriction as a result of sympathetic activation?
Tunica media is the layer of blood vessels responsible for vasodilation and vasoconstriction as a result of sympathetic activation.
What effect does tunica media have on blood pressure?
The cardiovascular system includes tubular organs called blood vessels that move blood across the body. The organ that provides the pressure required to force the blood through the vessels is the heart. In contrast to veins, which carry blood back to the heart, arteries carry blood away from the heart. The vascular wall of arteries and veins has three layers. The innermost layer of the tunic is called the tunica intima, followed by the middle layer, the tunica media, and the outer layer, the tunica adventitia.
Smooth muscle and elastic connective tissue make up the tunica media. When it comes to the upkeep of blood pressure, this layer is the most important of the three. As blood is forced out of the heart, the elastic fibers in this layer can withstand the strain applied to the blood artery. The elastic fibers apply the force back onto the blood when the heart relaxes, keeping blood pressure and flow during diastole.
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In response to a commission by the lincoln center, marsalis wrote blood on the fields in the european tradition of:______.
In response to a commission by the Lincoln center, Marsalis wrote blood on the fields in the European tradition of oratorio.
What Marsalis wrote blood on the fields in the European tradition?Blood on the Fields is a two and a half hour jazz oratorio which was performed by Wynton Marsalis. It was commissioned by Lincoln Center in which it treats the history of slavery and its aftermath in the United States of America. The background of Marsalis prepared him to form a music that drew from a diversity of traditions and styles. Therefore, in response to the Lincoln Center commission, he decided to create a work in the European oratorio tradition.
So we can conclude that In response to a commission by the Lincoln center, Marsalis wrote blood on the fields in the European tradition of oratorio.
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The release of myoglobin into the blood, caused by an electrical burn, can result in failure of?
The release of myoglobin into the blood, caused by an electrical burn, can result in failure of the kidneys.
How does myoglobin result in kidney failure?Myoglobin protein is present in the striated muscles including skeletal and heart muscles. Unbound myoglobin when released into the blood can lead to renal (kidney) failure.Myoglobin is a heme- containing protein that binds to oxygen and supplies oxygen to the muscle cells (myocytes) for energy.When in blood, myoglobin can damage kidneys by resulting in intrarenal vasoconstriction, injury or obstruction to renal tube.Levels of myoglobin can increase due to heart attack, muscle injury and damage. This in turn leads to kidney failure.Myoglobin can result in increase in potassium levels in blood which disturbs the rhythm of heart.Learn more about myoglobin here:
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The total collection of alleles in a population at any one time makes up that population's?
The total collection of alleles in a population at any one time makes up that population's gene pool.
Gene Pool:A gene pool is a collection of all the genes (including alleles) found in a population or species that is capable of reproduction. A big gene pool has a wide range of genetic diversity and is more resilient to environmental stresses. This could be any population, such as pond frogs, woodland trees, or town residents.
In order to analyze the genetic variation of a population, the gene pool must be identified. A population has a higher likelihood of obtaining features that increase its biological fitness and the chance of survival the more genetically varied it is.
As a single species, humans can interbreed with one another anywhere on Earth. Therefore, each allele of the approximately 19,000–20,000 human genes in our genome makes up the human gene pool.
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Given the following diagram, what product is produced at Location A?
This diagram shows various processes and products in the global carbon cycle. Location A shows organisms in the ocean undergoing photosynthesis and respiration.
Public Domain
Carbohydrates
Carbonic acid
Fossil fuels
Limestone
Which chain of volcanic islands is not part of a convergent/subduction plate boundary?
Hawai'an volcanic islands
Hawai'an volcanic islands is not part of a convergent/subduction plate boundary.
What kind of plate boundary produces a sequence of volcanic islands?convergent boundaryAlong the convergent boundary, the new magma (molten rock) rises and may erupt violently to form volcanoes, frequently creating arcs of islands. Divergent plate boundaries are created when two plates are moving apart.Why do volcanic chains and convergent borders coexist?Subduction causes melting that is partially molten. Water loss in the plate causes partial melting. Mantle material melts as a result and rises to the surface.Which are the 4 types of convergent boundries?Divergent Plate Boundary. Convergent Plate Boundary. Transform Plate Boundary. Hotspot.To learn more about volcanic islands visit:
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What determines the sequence and arrangement of amino acids
in a protein?
Explanation:
Greetings !The sequence of amino acids in a protein and protein function are determined by the genetic code or DNA. The order of deoxyribonucleotide bases in a gene . The basic building blocks of proteins. The sequence of amino acids in a protein and protein function are determined by the genetic code.
Tara has two dogs. they win many of the agility competitions they enter. these competitions test a dog's ability to run, jump, maneuver around and through obstacles, and follow complex instructions. these two dogs have a litter of puppies together. which description most correctly describes these puppies? the puppies are guaranteed to win agility competitions. with training, the puppies are likely to excel at agility competitions. the puppies will be born with the ability to complete agility competitions. without training. the puppies are no more likely to succeed at agility competitions than any other dog.
With training, the puppies are likely to excel at agility competitions
Agile dogs run, jump, and dart about gracefully. Some use their athletic skills to compete in agility trials.
What is agility ?A competitive canine sporting event called an agility trial involves dogs of different breeds navigating obstacles while being scored on their speed and accuracy. The purpose of agility courses is to show off a dog's athletic prowess, degree of conditioning, and readiness to cooperate with her handler. Physical acuity and mental focus are prerequisites for competitions.
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What are two ways in which the body gains
water?
OA. Sweating and drinking
B. Sweating and urination
OC. Drinking and cellular respiration
D. Cellular respiration and urination
Answer:
C.) Drinking and cellular respiration
Explanation:
During sweating and urination, water is lost.
During drinking and cellular respiration, the body gains water. Water is a product of cellular respiration.
The ability of a molecule to absorb infrared radiation is measured with ir spectrometers, which report the frequency of light absorbed in units of cm¯1. which explanation best describes this unit?
Spectrometer is a technique used to measured that how much a chemical substance absorbs light by measuring its intensity of light as a beam of light passes through solution.
IR spectrometer uses light over the infrared range from 700-15000 nm of electromagnetic radiation spectrum. If the concentration of greenhouse gases increases then more infrared radiation will be absorbed and emits back towards earth surface.
When infrared energy is absorbed by a matter the infrared causes the molecules or bonds to bend and vibrate. The matter gains kinetic energy which causes an increases in temperature. The absorption if radiation energy on matter causes an increases in temperature.
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The structural layer of the earth that flows because it is hot and under extreme pressure is what?
Eric has blue eyes. Because the gene for blue eyes is recessive. What must be true of eric regarding this trait?
Answer: He has homozygous
Explanation:
hope this is what you needed.
When more water is needed in the bloodstream, the __________ releases antidiuretic hormone.
The pituitary gland releases the antidiuretic hormone when more water is needed in the bloodstream.
Pituitary gland is a pea-sized gland which is located at the base of the brain and is vital for the development, growth as well as the functioning of the endocrine glands of the body.
Whenever, more water is needed in the bloodstream, the pituitary glands releases the antidiuretic hormone or the ADH. This hormone is produced naturally in the hypothalamus and helps in the constriction of the blood vessels and also helps the kidneys to regulate the amount of water as well as salts in the body.
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What is the name of the irreversible inhibitor (drug) used as an example in the lecture?
Diisopropylfluorophosphate (DPF) is the irreversible inhibitor (drug) used as an example in the lecture. the its an enzyme hydrolyses the pheophrous- Florine bond, but the phosphate remains bound to serine in the active site and deactivating it.
Irreversible inhibitor are contently /non contently bound to the specific enzyme and slow down the enzyme. invisible hibitors are 3 types such as group specific reagents , reactive substrate analogs also known as affinity label and inhibitor.
There are some examples of irreversible inhibitors -compound diisopropylphosphofluoridate (DIPF), nerve gases ,acetylcholinesterase ,and preventing transmission of impulse. Penicillin irreversibly inhibits the enzyme transpeptidase by reacting with transpeptidase.
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What is the ability of living things to maintain a relatively constant internal environment? metabolism homeostasis stimulus-response cellular respiration
The tendency to maintain a stable, relatively constant internal environment is called homeostasis.
Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment.
Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.
In contrast, positive feedback loops amplify their initiating stimuli, in other words, they move the system away from its starting state.
The concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose. If these values get too high or low, person might end up getting very sick.
Therefore, the tendency to maintain a stable, relatively constant internal environment is called homeostasis.
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It is important to maintain septic systems in order to _______. a. prevent treated sewage from contaminating groundwater b. process human waste into fertilizer c. prevent untreated sewage from contaminating groundwater d. none of the above please select the best answer from the choices provided a b c d
Answer:c prevent untreated sewage from contaminating groundwater
Explanation:That would mean the ground water would then be dirty and undrinkable
By what mechanism does pi-3 phosphate promote activation of pkb (protein kinase b)?
[tex]PI3K,[/tex] the mechanism does [tex]pi-3[/tex] phosphate promote activation of pkb .
Normally, the regulatory subunit linked to the active receptor directly stimulates [tex]PI3K[/tex]or is indirectly stimulated by adaptor molecules such as the insulin receptor substrate (IRS) proteins. A RAS protein that binds to GTP can also activate [tex]PI3K[/tex].
A receptor tyrosine kinase (RTK) on the plasma membrane is triggered when an external ligand binds to it, producing receptor dimerization and cross-phosphorylation of tyrosine residues in the intracellular domains. Cell metabolism, growth, proliferation, and survival are all influenced by protein kinase B, also known as Akt. Phosphoinositide-3-kinase is a key player in a multi-step process that regulates its activation.
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Where efferent motor neurons of the somatic nervous system communicate with their effector organs is called a:______.
Where efferent motor neurons of the somatic nervous system communicate with their effector organs is called a neuromuscular junction.
The nerve fibers that transmit information from the brain to the peripheral nervous system in order to start an action are known as efferent neurons, also referred to as motor neurons. To put it another way, these are the neurons that instruct your body to carry out a task, like removing your hand from a hot skillet. Both skeletal and smooth muscle is controlled by motor neurons' efferent nerve fibers.
The terminal end of a motor nerve and a muscle (skeletal, smooth, or cardiac) form the neuromuscular junction (NMJ), which is a synaptic connection. It is the location where the action potential is sent from the nerve to the muscle. It is also a location for a variety of illnesses and a site of action for a variety of pharmaceuticals. The presynaptic terminal (also known as the efferent neuron), the synaptic cleft, and the postsynaptic membrane make up the architecture of a neuromuscular junction (i.e. the membrane of the muscle cell).
Each muscle fiber has one neuromuscular junction, which is normally found close to the middle of the fiber. As a result, the motor end plate will also be situated close to the muscle fiber's middle.
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Which of these organisms experience the highest rate of cellular respiration due to activity levels
A. Plants
B. Protozoa
C. Animals
D. Fungi
Answer: animals
Explanation:
Answer: It's Fungi.
Explanation:
Amino acids are used to make _____, which are responsible for escorting substances into and around the body as well as across cell membranes
Answer:
protein
Explanation:
Amino acids are joined together to form proteins. The main function of amino acids is to serve as building blocks for proteins
Characid fishes are found naturally only in south america and africa. Fossils of these fish are not found on any other continents. What is the most likely explanation of this distribution pattern?
Characid fishes arose prior to the separation of the African and South American continents us the most likely explanation of this distribution pattern.
What is Characid fishes?The family Characiformes, sometimes known as the characids or characins, includes freshwater subtropical and tropical fish. The term "characins" has been used historically, but scientists now prefer the term "characids" to represent the group's status as a largely monophyletic family rank group.The order Characiforms contains the Characidae family. The bodies of characiforms are virtually always scaled, they have well-developed teeth, a pelvic fin, and typically an adipose fin.There are many different types of environments that these fish call home. From southwest Texas and Mexico through Central and South America, they are native to the Americas. Although many of these fish are found in rivers, some, like the blind cave tetra, actually live in caves.Learn more about Fossil here:
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Question: Characid fishes are found naturally only in South America and Africa. Fossils of these fish are not found on any other continents. What is the most likely explanation of this distribution pattern?
A) Characid fishes arose prior to the separation of the African and South American continents
B) Characid fishes arose in the South Atlantic Ocean and migrated to Africa and South America
C) These fishes arose in either Africa or South America and migrated across the South Atlantic Ocean to another continent
D) Convergent evolution is responsible for the distribution of characin fishes
What develops from the formation of ossification centers within mesenchymal tissue?
Answer:
Compact and spongy bone
Explanation: Compact and spongy bone develops directly from sheets of mesenchymal (undifferentiated) connective tissue. The flat bones of the face, most of the cranial bones, and the clavicles (collarbones) are formed via intramembranous ossification.
What should you do if every dilution of your sample results in a plate that is too few to count (tftc)?
When every dilution of your sample results in a plate that is too few to count we should filter the original sample and use most probable number method .
Probable number method count and determine the number of bacteria in a culture, plate aliquots of the dilutions onto agar with sterile pipettes, spread with glass sticks, incubate at 37°C and count the number of colonies. It is imperative that you utilize your best culture technique.
Not all bacterial cells produce colonies, as some bacteria tend to clump or aggregate, and some are nonviable. For this reason results are reported as colony forming units (CFU)/ml of bacterial culture. Ideally only plates with 25-250 colonies are used.
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Some citizens are concerned about the use of genetically modified plants because they:_____.
Some citizens are concerned about the use of genetically modified plants because they cause allergic problems.
Genetic engineering is a specific form of gene technology that modifies the genetic code of living things like plants, animals, and microorganisms. The potential for adverse consequences on the human body posed by GM foods is the biggest danger. It is thought that eating these genetically modified crops can lead to the emergence of illnesses resistant to antibiotic treatment.
The transmission of antibiotic resistance, toxicity, and allergenicity are the three main health impacts of GM foods that raise the most concern. When blown into a natural setting, pollen from a genetically modified crop that carries a pesticide may kill nontarget creatures. Genetically engineered crop pollen can contaminate non-genetically modified crop kinds.
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