Hemoglobin contains the iron atom and the four globin molecules. Heme is the group containing iron atom. Each globin molecule surrounds a central heme group to which a polypeptide chain is joined up. Statements b, e and f.
What is the central atom in the structure of hemoglobin ?Iron is the central atom in the structure of hemoglobin.
The structure of hemoglobin is composed of four protein chains.There are 4 iron atoms in each molecule of hemoglobin. Each globin molecules is consisted of two linked pairs of polypeptide chain.
Each hemoglobin molecule is composed of two alpha chains and two beta chains and each is linked with a heme group that is containing a central metal that is iron.
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Select the type of interaction which best describes the attraction between mg2+ ions and water molecules.
ion-dipole is the type of interaction which best describes the attraction between mg2+ ions and water molecules.
The intermolecular force of attraction between a charge ion (cation or anion) and a molecule is known as an ion-dipole interaction. It is frequently found in solutions where ionic compounds dissolve in polar solvents. When an ion interacts with a non-polar molecule, an ion-induced dipole force is produced. The charge of the ion, like a dipole-induced dipole force, causes a distortion of the electron cloud in the non-polar molecule, resulting in a temporary partial charge. Magnesium ion interacts with an ion dipole via water.
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the complete question is :
Select the type of interaction which best describes the attraction between Mg2+ ions and water molecules.
A) dipole-dipole
B) dipole-induced dipole
C) ion-dipole
D) ion-induced dipole
E) ion-hydrogen bond
2. explain how the countercurrent multiplier in the loop of henle is the key to the regulation of urine concentration.
The renal countercurrent exchange system is made up of closely connected tubules and vasa recta capillaries. The countercurrent multiplier actively transports solutes into the medulla.
Vasa recta removes water and keeps the medulla interstitial fluid from becoming diluted. In the renal tubules, countercurrent multiplication is the procedure of using energy to generate an osmotic concentration which enables users to absorbs liquid from tubular fluid and start producing concentrated urine. A countercurrent mechanism system expends energy to create a concentration gradient. It is abundant in nature, particularly in mammalian organs.
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Which of the following best explains how environmental stressors, such as wildfires can affect biodiversity in an ecosystem
The statement that best explains how environmental stressors, such as wildfires can affect biodiversity in an ecosystem is as follows: Ecosystems with more species diversity are more likely to recover after a disturbance than ecosystems with low species diversity (option C).
What are environmental stressors?Environmental stressors refers to the stress that nature is undergoing, such as pollution or a forest fire.
Environmental stress refers to factors within an environment that negatively affects productivity, reproduction, and development of the environment.
Biodiversity is the diversity (number and variety of species) of plant and animal life within a region.
An ecosystem is a system formed by an ecological community and its environment that functions as a unit i.e. the interconnectedness of organisms (plants, animals, microbes) with each other and their environment.
When the species of an ecosystem are highly diverse, this increases their chances of survival after an environmental stress compared to an ecosystem with species that are not diverse enough.
The options to the incomplete question are as follows:
After an environmental stress, a genetic bottleneck may occur, which will increase genetic diversity.Habitat diversity will increase the available niches if the landscape becomes more uniform after a disturbance.Ecosystems with more species diversity are more likely to recover after a disturbance than ecosystems with low species diversity.Smaller populations are less likely to go extinct than larger populations, so the species diversity will remain constant.Learn more about environmental stressors at: https://brainly.com/question/17034778
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according to kinetic molecular theory, gas particles: select the correct answer below: exert attractive forces amongst one another exert repulsive forces amongst one another exert both attractive and repulsive forces amongst one another none of the above
None of the above. There is no force of attraction between gas particles and between the particles and the container walls. Interactions with the package's walls and gas particle collisions are both completely elastic.
Because the observed connections between a gas's pressure, volume, and temperature are typically not perfect, the gas laws do not adequately account for these interactions. In this section, the reasons for these aberrations from the conduct of an inert gas are considered.
Gas molecules behave almost exactly like ideal gas particles at relatively low pressures because they are (on average) so widely apart and have virtually no attraction for one another. However, the force of attraction is also no longer negligible at higher pressures. This force marginally reduces the pressure (assuming the volume is constant) or decreases the volume by drawing the molecules closer together (at constant pressure). Due to the molecules' lower KE in comparison to the attractive forces, which makes them less able to overcome these forces after interacting with one another, this change is more pronounced at low temperatures.
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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.receptor , endocytosis
After a virus binds to a specific host cell receptor, it enters the cell via either receptor-mediated endocytosis by fusion of the viral envelope with the plasma membrane of the target cell.
The statement above is the process of virus penetration at the virus replication stage. Penetration is the stage of injecting viral nucleic acid into the host cell. The virus perforates the host cell's plasma membrane (and cell wall, if present) using enzymes such as lysozyme in bacteriophages.
At the penetration stage, the virus particles will be carried directly into the cell. This process is known as penetration. Some DNA viruses can also enter host cells via receptor-mediated endocytosis.
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Which stage of the cell cycle listed below does NOT involve division of the nucleus?
a. interphase
b. prophase
c. metaphase
d. anaphase
e. telophase
Answer: The correct answer is a. interphase
Explanation:
The interphase stage occurs before the other stages of mitosis (nuclear division) begin. Once the phases of mitosis are complete, the cell will divide into two new cells during the cytokinesis process.
In the cross bb x bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
next, you perform a cross with a mouse with black fur and a mouse with white fur. which result(s) for the offspring would confirm that the mouse with black fur was heterozygous?
a. 4 mice with black fur
b. 8 mice with black fur, 1 mouse with white fur
c. 5 mice with black fur, 6 mice with white fur
d. 6 mice with black fur, 2 mice with white fur
d. 75% will have the same phenotype as the parents.
Result(s) for the offspring would confirm that the mouse with black fur was heterozygous
b.8 mice with black fur, 1 mouse with white fur
c.5 mice with black fur, 6 mice with white fur
d. 6 mice with black fur, 2 mice with white fur
The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive). Then a phenotypic ratio of 2 : 1 is observed, there are chances of lethal allele.
To calculate percentage of offspring you need the total number of predicted offspring. And divide the (number of appeared phenotype) by (the total number of offspring). Multiply the number by 100 to get your percentage.
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1. in chimpanzees, straight fingers are dominant to bent fingers. cross a heterozygous chimp with one that has bent fingers. what are the genotypic and phenotypic ratios of the offspring
The genotype of the offspring will be homozygous recessive (rr) based on the genetic cross. Because they lack the dominant allele, the child will therefore be unable to roll their tongue. Therefore, there is no chance that kids will exhibit a tongue-rolling personality.
The genotype of the offspring will be homozygous recessive (rr) based on the genetic cross. Because they lack the dominant allele, the child will therefore be unable to roll their tongue. Therefore, there is no chance that kids will exhibit a tongue-rolling personality.
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results of an abo blood typing indicate agglutination reactions when anti-a and anti-b are added to the blood sample. the blood type of the individual would therefore be
For instance, if the anti-A antibody agglutinates a blood sample from a person but not the anti-B antibody, the A antigen is present but not the B antigen.
In the event of A-B-O blood compatibility, a type O mother's anti-A and anti-B antibodies may get into the fetus's circulatory system and cause fetal RBC agglutination.
Anti-A antibodies (added to the first well) will produce agglutination when they come into contact with A antigens on AB erythrocytes. Similar to this, agglutination results from anti-B antibodies coming into contact with B antigens on AB erythrocytes.
The Anti-A, Anti-B, and Anti-A,B reagents are used to identify the ABO blood group in red blood cells. They are employed to establish the
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Which of these RNA polymerases catalyze the synthesis of rRNA in eukaryotes?
A) RNA polymerase I
B) RNA polymerase II
C) RNA polymerase III
D) RNA polymerase IV
how many different trisaccharides can be made by linking one glucose, one mannose, and one galactose?
One glucose, one mannose, and one galactose can be linked to create one of the 12,288 possible trisaccharides, but only one of the six possible tripeptides.
Trisaccharides are oligosaccharides made up of three monosaccharides connected by two glycosidic linkages. Similar to the disaccharides, any hydroxyl group on the constituent monosaccharides can be used to build a glycosidic link. Even if the three constituent stachyose are all the same (for example, glucose), various bond configurations (regiochemistry) and stereochemistry (alpha- or beta-) lead to trisaccharide diastereoisomers with distinct chemical and physical properties. One glucose, two galactose, and one fructose unit are connected by three glycosidic linkages to form the tetrasaccharide known as stachyose. Proteins with a high sweetening index include monellin and thaumatin.
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unlike the liver and skeletal muscles, the brain does not store large amounts of glycogen. how does the body supply glucose to the brain during periods of fasting?
The brain only relies on sugar molecules so during the fasting stage after glucose is used up, fat is the next source of energy. Fat is a breakdown of fatty acids into energy.
Under normal conditions, glucose (sugar) from food is stored in the liver and muscles as the main source of energy. Before entering the fasting phase, the body will burn this energy source so that we can carry out activities as usual. After glucose runs out, fat is the next source of energy. Our bodies, which used to burn glucose, now switch to metabolizing fat during fasting.
We need to know about the metabolic processes during fasting so we can understand that the human body has natural mechanisms that are used to overcome unwanted conditions so that they remain in normal conditions. This natural mechanism is known as homeostasis. The body of the fasting person is not supplied with food, but the body will survive. This is because the body still has energy reserves in the form of fat, which comes from carbohydrates stored in the form of glycogen.
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if sodium was not able to be extracted on the ascending end of the loop of henle, what do you predict would happen?
several muscles work together to literally rotate the thing. what do we call an entire group of muscles that work together?
The muscles that extend are called extensors. We can stand up straight and lift things thanks to these muscles. These muscle units work as guy wires when they cooperate.
What is the name for a collection of muscles that cooperate?The thigh can be rotated laterally with the help of several muscles. What do you name a collection of muscles that cooperate? Synergists. Flexing the wrist is one of the responsibilities of the flexor digitorum superficialis.
how do muscles interconnect?While muscles can pull bones, they are unable to push them back into place. Flexors and extensors thus cooperate in pairs. To bend a limb at a joint, the flexor muscle contracts. The flexor then releases as the extensor contracts to extend once the movement is finished.
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Which of the following types of molecules help to hold the DNA strands apart while they are being replicated? a. primase b. single-strand DNA binding proteins c. DNA polymerase d. ligase
The correct option is B : Single-strand DNA binding proteins Proteins known as Binding Proteins maintain the two DNA strands apart and the Replication Fork intact.
Single-strand binding proteins wrap the split strands of DNA at the replication fork, preventing them from recombining into a double helix.
In addition to the proteins and enzymes listed above, further proteins and enzymes are required to keep DNA replication functioning properly. One example is the sliding clamp protein, which keeps DNA polymerase III molecules in position while they create DNA.
The sliding clamp is a ring-shaped protein that prevents the lagging strand's DNA polymerase from drifting away when it restarts at a fresh Okazaki fragment
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what can we infer from nerve cells having long extensions that help them pass multiple messages to other cells simutaiously
Cell shape helps cells perform specific function infer from nerve cells having long extensions that help them pass multiple messages to other cells simutainously.
The central nervous system consists of the brain and spinal cord, while the peripheral nervous system consists of the somatic and autonomic nervous systems. These two systems work together to control all activities in the body, both consciously and unconsciously.
Section of the Nervous System in HumansIn general, the nervous system consists of several parts, namely the brain, spinal cord, and nerve cells (neurons). The functions of these parts are related to one another. Here is the explanation:
BrainThe brain is the control center whose job is to regulate all functions in the body, starting from movement, secretion or secreting hormones, thinking or cognitive power, sensations, to emotions.
Spinal cordThe spinal cord is part of the central nervous system. Some stimuli that are reflexes can pass through the spinal cord without going through the brain.
Nerve cells (neurons)Neuron is the working unit of the central nervous system. Consists of 12 cranial nerves, all spinal nerves, and their branches. Its function is as a conductor of information in the form of stimuli or impulses. With the presence of these nerve cells, both organs and movement systems can respond as they should.
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Multiple Choice pls hurry 15 points!!!
Which physical adaptations increase a plant’s chances of survival in a cold environment?
(This is a multiple choice!!! Select all that apply.)
A- having , water-storing leaves
B- having shallow root,
C- having dark-colored leaves
D- having needle-like leaves that do not hold snow
A,B,D
..........................................
Please help! Will give brainliest
Answer:
D. Chromosomes line up along the middle or equatorial plate.
Explanation:
which observation suggested to sutherland the involvement of a second messenger in epinephrine's effect on liver cells?
Only when adrenaline was given to healthy cells was glycogen breakdown observed is the observation suggested to sutherland that involve a second messenger in epinephrine effect on liver cells.
Adrenaline, commonly known as epinephrine, is both a neurotransmitter and a hormone. Your adrenal glands, which are hat-shaped glands situated on top of each kidney, produce and release it as a hormone. In the central nervous system, it functions as a chemical messenger, or neurotransmitter, to help with the transfer of nerve signals from one nerve cell, muscle cell, or gland cell to another. Epinephrine is produced by your sympathetic nervous system as part of your body's "fight-or-flight" reaction, which is an emergency response mechanism to danger. In medicine, the flight-or-flight response is also referred to as the acute stress response. Catecholamines include substances including norepinephrine, dopamine, and epinephrine. Their name alludes to a particular chemical that is a part of their structure. Within your adrenal gland, norepinephrine is converted to the hormone epinephrine. Epinephrine is a very small neurotransmitter. Your nerves barely produce anything at all. It affects metabolism, focus, enthusiasm, and anxiety. It also has an effect on concentration.
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mr. exotic ordered an rflp analysis to determine the father of his new-born tiger litter. you are the scientist in charge of analyzing the results. who is the biological father according to the rflp analysis below? mo
According to the RFLP analysis, F3 is a potential father to a newborn litter of tiger cubs.
Restriction fragment length polymorphism (RFLP) analysis was one of the first techniques widely used to detect variation at the DNA sequence level. RFLP detection was carried out based on the possibility to compare the profile of the bands produced after cutting with restriction enzymes against the target DNA/from different individuals.
The band that the child observes must match that of the mother or father. The band observed in a child who does not match either father's mother is unlikely because in the child's DNA half of the chromosomes come from the father's side and a half from the mother's side
In the given line pattern, I have matched the son line with the father to be, Only F3 is matched.
Your question is incomplete, see the complete question in the picture.
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Explain how temperature and air pressure play a role in creating wind.
Answer: Since warm air is less dense and creates less air pressure, it will rise; cold air is denser and creates greater air pressure, and so it will sink.
True or false. In the example described in the tutorial, the red amoebas survived the catastrophic event, and all future generations of amoebas were red because the red amoebas had a higher reproductive rate than the blue ones.
It is false statement that the red amoebas survived the catastrophic event, and all future generations of amoebas were red because the red amoebas had a higher reproductive rate than the blue ones.
The process through which populations of living things adapt and change is known as natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. This variety indicates that some people have characteristics that are more environment-appropriate than others. People that possess advantageous qualities, or adapted traits, are more likely to live and procreate. The adaptable qualities are subsequently passed on to the next generation by these people. These beneficial characteristics spread across the population over time. Favorable features are passed down across generations as a result of natural selection. This natural selection covers all characteristics morphological, ecological , environmental and reproductive of organism.
Hence, reproductive capability alone cannot play role natural selection.
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which of the following is an example of a parasite? a. a worm in your intestine b. a lion hunting zebras c. bee stinger in your arm d. a honeybee on a flower
A worm in your intestine is an example of a parasite. Thus the correct answer is option (A).
The transmission of parasitic illnesses can happen in a variety of ways. Some diseases can spread through sexual contact. Certain parasites can be spread by insects that serve as a disease's vector or carrier.
Both the host and the parasite are housed within the same body as the parasite. A creature that lives on or inside another living organism and depends on it for nutrition is referred to as a "parasite." The relationship is referred to as parasitic when one creature, the parasite, feeds on another, the host, harming or even killing the host.
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The three main factors that affect diffusion are concentration, , and .
Explanation:
concentration gradienttemperaturesize of moleculesstate of matterHope it helps. Please mark brainliest..
The three main factors that affect diffusion are concentration, molecule size, and temperature of the substances, and by the process of diffusion, the molecules flow from a higher to a lower concentration.
What is the importance of diffusion?The diffusion is the mechanism where the molecules move from the higher concentration to the lower concentration, and this mechanism is seen in many cellular processes such as the gases that exchange in the blood vessel near the lungs' alveoli and at the cellular level. Diffusion is important for various cellular activities, and as it is a passive transport, it does not require energy. Diffusion is seen in both plants and animals, and the importance of diffusion is that it depends upon the size of the molecules, and the smaller molecules diffuse faster than the larger.
As a result, the concentration, molecule size, and temperature of the substances are the three main factors that influence diffusion.
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using nanoengineering techniques, it is possible to attach magnetic beads to the surface of cells to measure their resistance to applied forces. it is also known that the toxin acrylamide can depolymerize intermediate filaments, such as keratin. treating cells with acrylamide would have what effect on the mechanical rigidity of a skin cell, i.e. keratinocytes?
They are the executors of the re-epithelialization process, whereby keratinocytes migrate, proliferate, and differentiate to restore the epidermal barrier.
What is keratinocytes?A pro-inflammatory signaling cascade that results in the activation of local immune cells is started by damaged keratinocytes. The tissue also facilitates immune-suppressive actions to control localized inflammation.
In both vivo and in vitro settings, calcium is the primary regulator of keratinocyte development. As keratinocytes move through the epidermis's many layers to construct the permeability barrier of the stratum corneum, a calcium gradient within the epidermis encourages keratinocytes' successive development.
In the epidermis' basal layer, keratinocytes multiply and begin to gradually differentiate as they move toward the surface. They undergo a significant morphological change during this process and begin to make keratin, cytokines, growth factors, interleukins, and complement factors.
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the kern river oil field has gone through periods of boom and bust, starting with the tar mined by the yokut people to the more recent extraction of millions of barrels of crude oil annually. each period of decline in oil production was revived by .
Every time oil output fell off, new technologies, greater demand, and higher oil prices brought it back.
Although there is some semantic overlap between the phrases innovation and invention, they are nevertheless very distinct.
An invention can be anything that was concocted in one's imagination, including a lie, a discovery, a musical piece, or anything else. "A device, contrivance, or procedure originated after study and experiment" is the definition of invention that is most usually confused with innovation because it typically refers to something that has never been done before.
Innovation on the other hand might relate to a completely new thing or a change made to an already-existing concept, product, or sector. The first mobile phone was either an innovation or an invention, and the first telephone was unquestionably an invention.
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You pick up a ice cream andwich from the chool cafeteria and you tick it in your hoodie pocket o your worker. You run into your chem lab partner on your way to your eat and he tell you your homework i due next period. You forget all about your ice cream. Until you pull the platic full of muh oUt of your pocket later that afternoon. I thi a phyical or chemical change?
Ice cream melting in the pocket is a physical change that can be undone to return to its original state.
What is a physical and chemical change?
The nature of the substance, the particles that make up it, and the quantity of particles all remain unaltered during a physical change. When a substance undergoes a chemical reaction, the new substance's properties differ from the original, as do the particles and the number of particles.
PHYSICAL CHANGES
A physical change does not create any new substance and is only temporary (it can be undone in some circumstances, such as when cutting paper).
Typically, very little heat or light is absorbed or released.
A physical change does not cause a substance's mass to change.
CHEMICAL CHANGES
A permanent change occurs when a new material is created during a chemical reaction ( is usually irreversible)
Many heat or light rays are absorbed or emitted.
A chemical change does cause a substance's mass to change.
Ice cream melting in the pocket is therefore a physical transformation that can be undone to return it to its original state.
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If you were traveling from Monterey on the California Coast to visit Yosemite National Park, on the eastern side of the state, what three major land forms would you pass through? (in order)
A) The Klamath Mountains, the Cascade Range and the Modoc Plateau.
B) The Transverse Ranges, the Mojave Desert and the Great Basin.
C) The Coast Ranges, the Central Valley and the Sierra Nevadas.
D) The Central Valley, the Sierra Nevadas and the Great Basin.
C.Every year, the Sierra Nevada & Coast Mountain Ranges change elevation and descent by a few millimeters. due to groundwater pumping during the summer and winter in the Central Valley of California.
Geophysicists have calculated that the annual increase in these mountain ranges is caused by the progressive depletion of a Central Valley aquifer brought on by groundwater pumping. Every year, the Sierra Nevada & Coast Mountain Ranges change elevation and descent by a few millimeters. Approximately the depth of a dime, with a 150-year growth of upwards to 15 cm in total (ca. 6 inch). due to groundwater pumping during the summer and winter in the Central Valley of California. As a result, the state's faults are stressed and the likelihood of an earthquake is increased by Coast Range, the Central Valley, as well as the Sierra Nevadas.
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a rock star has been involved in two paternity suits in the past few years. he has blood type a. show the possible genotypes in each of the following situations and then decide and indicate whether he could be the father of each of the children. the mother is type o and the baby is type b. the mother is type ab and the baby is type b.
The possible genotype of the rock star with the blood group A would be AA or AO. Therefore;
when the mother is O and the baby is B he is not the father of the childWhen the mother is type AB and the baby is type B he is still not the father of the child.What is genotype?Genotype is defined as the genetic components that makes up an individual which is a unique characteristics.
There are various blood group genotypes that can be found in human beings which include the following:
Type A (marker A)Type B (marker B)Type AB (blood cells have both A and B markers)Type O (blood cells have neither A or B markers)Therefore, when the mother is O and the baby is B he is not the father of the child because he is of blood group A and the mother is O which shows that neither of them has the gene for blood group B.
And when the mother is type AB and the baby is type B he is still not the father of the child because the mother has both A and B gene while the father has for only A.
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he ph of the cerebrospinal fluid is monitored by which of these brainstem centers? a. medullary baroreceptors b. hypothalamic osmoreceptors c. central chemoreceptors d. prg
The brainstem centres' hypothalamic osmoreceptors keep track of the cerebrospinal fluid's pH. A clear, colourless bodily fluid called cerebrospinal fluid (CSF) is present within the tissue.
That all vertebrates' spinal cord and brain are protected by cerebrospinal fluid. The choroid plexus of the brain's ventricles contains specialized ependymal cells that create CSF, which is then absorbed in arachnoid granulations. Between cells and an entire organ, there is a biological organising level called tissue. A tissue is an assembly of comparable cells and their extracellular matrix from the same origin that work together to perform a certain job. Tissues can be defined as a group of cells with similar structure and function.
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