During the first half of the chymotrypsin mechanism where the acyl-enzyme intermediate is formed, what role does his play?.
Answers
During the first half of the chymotrypsin mechanism where the acyl-enzyme intermediate is formed, the role of His is to act as a proton shuttle. It is also responsible for activating the catalytic residue, Ser 195.The mechanism of chymotrypsin is initiated when a substrate binds to the enzyme's active site, resulting in the formation of an enzyme-substrate complex. His 57 plays a crucial role in the chymotrypsin mechanism by acting as a proton shuttle and activating the catalytic residue Ser 195.
The amino acid His 57 is positioned near the enzyme's active site and acts as a general base catalyst. It is responsible for activating the catalytic residue, Ser195, by removing its hydrogen ion.The carboxyl group of the substrate is then attacked by Ser195, resulting in the formation of an acyl-enzyme intermediate. The intermediate is then stabilized by the oxyanion hole, which is composed of a series of hydrogen-bonding interactions that surround the negatively charged oxygen atom of the carbonyl group.The next step in the chymotrypsin mechanism is the release of the leaving group, which is accomplished by the addition of water.
His 57 acts as a general acid catalyst during this step, donating a proton to the water molecule, resulting in the formation of a hydroxyl ion. The hydroxyl ion then attacks the carbonyl carbon of the acyl-enzyme intermediate, causing the bond between the carbonyl carbon and the substrate to break. This results in the formation of the final product and the regeneration of the active site.
To know more about chymotrypsin visit:-
https://brainly.com/question/17348192
#SPJ11
Related Questions
a mutation in the gene for plasmin that results in non-functional plasmin can cause:
Answers
Answer:
A mutation in the gene for plasmin that results in non-functional plasmin can cause a condition known as plasminogen deficiency. This condition can lead to a buildup of fibrin, a protein involved in blood clotting, in the blood vessels, which can lead to blood clots and an increased risk of thrombosis. Additionally, it can cause poor wound healing, recurrent infections, and abnormal bleeding.
A plasmin gene mutation that results in non-functional plasmin will prevent any clotting.
What is mutation?
A mutation in biology is an adjustment to the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA. DNA or RNA can be found in the viral genome. Errors in DNA replication, viral replication, mitosis, meiosis, or other types of DNA damage (such as pyrimidine dimers from exposure to ultraviolet radiation) can result in mutations, which can then be repaired in error-prone ways (particularly microhomology-mediated end joining), cause errors in other types of repair, or result in errors during replication (translesion synthesis). Due to mobile genetic elements, mutations can also result from the insertion or deletion of DNA segment.
To learn more about mutation visit;
https://brainly.com/question/17130462
#SPJ4
Which of the following is NOT a distinctive feature of early attempts at walking?
A. wide base of support
B. toeing-out of the feet
C. heel strike
D. high-guard arm position
E. flat-footed contact
Answers
D. High-guard arm position is NOT a distinctive feature of early attempts at walking.
Early attempts at walking in infants typically exhibit several distinctive features as they develop their walking skills. These features include a wide base of support, toeing-out of the feet, heel strike, and flat-footed contact.
A wide base of support refers to the stance where the feet are positioned relatively far apart, providing stability and balance during the initial stages of walking. Toe-out of the feet refers to the outward angling of the toes, which helps with maintaining balance and stability while taking steps.
Heel strike occurs when the heel makes initial contact with the ground during the walking motion. This is followed by a flat-footed contact where the entire foot comes into contact with the ground, providing stability and weight distribution.
However, a high-guard arm position is not a distinctive feature of early attempts at walking. Instead, infants typically hold their arms in a position away from their body, often at shoulder height or slightly lower, to assist with balance and coordination during the walking process.
In summary, while a wide base of support, toeing-out of the feet, heel strike, and flat-footed contact are characteristic features of early attempts at walking, a high-guard arm position is not typically observed.
To learn more about distinctive features, here
https://brainly.com/question/32158783
#SPJ4
How ong does it take to get pregnant
Answers
6 days or 2 to 3 weeks you will start to notice
Explanation:
I really don't know but I'm taking information that I have heard...
What is the process that removes dead yeast cells in the traditional champagne method?
Answers
In the traditional champagne method, also known as méthode champenoise, the process that removes dead yeast cells is called riddling or remuage. After the wine undergoes its secondary fermentation in the bottle, the yeast cells die and form a sediment in the bottle.
To remove this sediment, the bottles are placed on special racks called pupitres at a 45-degree angle, and the bottles are rotated slightly every day to encourage the dead yeast cells to settle in the neck of the bottle. This process can take several weeks or even months, depending on the producer's preference.
Once the dead yeast cells have settled in the neck of the bottle, the next step is called disgorging. The neck of the bottle is frozen to form a plug of ice containing the sediment. The bottle is then quickly opened, and the pressure from the carbon dioxide in the wine forces the plug of ice out, along with the dead yeast cells. The wine is then topped up with a mixture of wine and sugar, called the dosage, to replace the lost volume and balance the wine's acidity.
Overall, riddling and disgorging are crucial steps in the traditional champagne method, as they remove the dead yeast cells and ensure a clear, bright wine that is ready for consumption.
Learn more about sediment here:
brainly.com/question/31539857
#SPJ11
In economics, a trade off is best decribed as
A.the study of people producing and exchanging ideas
B.exchanging goods for services
C.giving up some of one thing to have more of some other thing
Answers
Answer:
oi
Explanation:
ok
Answer:
C
Explanation:
.
Please help and thanks!
Answers
Answer:
a
c
b
Explanation:
what type of waste does the digestive system get rid of
Answers
Which of the following best describes the pathway of parasympathetic fibers to the lacrimal gland?
(A) CN VII . . . greater petrosal nerve . . . nerve of the pterygoid canal . . . pterygopalatine ganglion . . . zygomatic branch of V2 . . . lacrimal branch of V1
(B) CN IX . . . lesser petrosal nerve . . . nerve of the pterygoid canal . . . pterygopalatine ganglion . . . infraorbital branch of V2 . . . lacrimal branch of V1
(C) CN VII . . . greater petrosal nerve . . . otic ganglion . . . infraorbital branch of V2 ... lacrimal branch of V1
(D) CN VII . . . deep petrosal nerve . . . nerve of the pterygoid canal . . . pterygopalatine ganglion . . . infratrochlear branch of V2 . . . lacrimal branch of V1
(E) CN V . . . ophthalmic branch of V1 ... lacrimal branch of V1
Answers
(A) CN VII . . . greater petrosal nerve . . . nerve of the pterygoid canal . . . pterygopalatine ganglion . . . zygomatic branch of V2 . . . lacrimal branch of V1 best describes the pathway of parasympathetic fibers to the lacrimal gland.
The parasympathetic fibers to the lacrimal gland originate in the superior salivatory nucleus of the brainstem. They travel along the facial nerve (CN VII) to the geniculate ganglion. From there, they continue as the greater petrosal nerve, which enters the pterygopalatine fossa. In the pterygopalatine fossa, the greater petrosal nerve synapses with neurons in the pterygopalatine ganglion. Postganglionic parasympathetic fibers from the pterygopalatine ganglion then travel along the zygomatic branch of the maxillary nerve (V2) to the lacrimal branch of V1. The lacrimal branch of V1 innervates the lacrimal gland.
The other answer choices are incorrect because they do not correctly describe the pathway of parasympathetic fibers to the lacrimal gland. For example, answer choice (B) incorrectly states that the lesser petrosal nerve innervates the lacrimal gland. The lesser petrosal nerve is actually a branch of the glossopharyngeal nerve (CN IX), and it innervates the parotid gland.
To learn more about parasympathetic fibers, here
https://brainly.com/question/33302362
#SPJ4
Will give brainliest
Living systems
a) violate the first law of thermodynamics.
b) decrease their entropy while increasing the entropy of the universe.
c) are only compelled to follow the first law of thermodynamics
d) are examples of a closed system
e) violate the second law of thermodynamics
Answers
Living systems are examples of a closed system, as they have an organism and unit configuration.
What is a closed system example?A closed system is one in which only energy is transferred and not any matter. Earth is considered the best example of a closed system as it only transfers energy and not matter around its atmosphere. And it is a natural process that is happening in and around the Earth.
With this information, we can conclude that Living systems are examples of a closed system, as they have an organism and unit configuration.
Learn more about closed system in brainly.com/question/14782983
#SPJ1
are oxygen and hydrogen together a compound?
Answers
How is the relationship between eons and eras different than the relationship between hours and minutes?
Answers
Answer:
Explanation:
Eras are made up of eons, but hours are made up of minutes. Eons are made up of eras, but minutes are made up of hours. Eras are not even divisions of time, while minutes are. Eons are even divisions of time, while hours are not.
During the first phase of glycolysis:
Answers
During the initial stages of the energy-releasing phase of glycolysis, two molecules of G3P are oxidized, and a phosphate group is attached to the resulting oxidized molecules. Hence, option (d) is the correct answer.
During the initial stages of the energy-releasing phase of glycolysis, two molecules of glyceraldehyde 3-phosphate (G3P) undergo specific transformations. Glycolysis is a metabolic pathway that breaks down glucose into pyruvate, generating ATP and NADH in the process.
(b) In this step, two molecules of G3P are oxidized, meaning they lose electrons. This oxidation reaction leads to the formation of two molecules of 1,3-bisphosphoglycerate (1,3-BPG). During this process, NAD+ (nicotinamide adenine dinucleotide) is reduced to NADH, as it accepts the electrons released from the oxidation of G3P.
(c) After the oxidation step, a phosphate group (Pi) is added to the unstable 1,3-BPG molecules, resulting in the formation of two molecules of 3-phosphoglycerate (3-PG). This addition of a phosphate group occurs through the action of the enzyme phosphoglycerate kinase, and it plays a crucial role in the subsequent steps of glycolysis.
In conclusion, during the initial stages of the energy-releasing phase of glycolysis, two molecules of G3P are oxidized, and a phosphate group is attached to the resulting oxidized molecules.
Hence, option (d) is the correct answer.
Learn more about glycolysis from the given link:
https://brainly.com/question/1966268
#SPJ11
Correct Question:
During the first steps of the energy-releasing portion of glycolysis:
(a) Two molecules of G3P are reduced.
(b) Two molecules of G3P are oxidized.
(c) A phosphate group is attached to unstable oxidized G3P molecules.
(d) Both B and C
why do stomach cells need more lysosomes than heart cells
Answers
Stomach cells need more lysosomes than heart cells because stomach cells are involved in digestive role.
LYSOSOMES:
Lysosomes are membrane-bound organelles found in eukaryotic cells. Lysosomes contain a lot of digestive enzymes capable of breaking down biological molecules such as lipids, proteins etc. This means that a cell that contains more of lysosomes organelles should perform a digestive role. Stomach is a compartment in some living organisms involved with digestion of food molecules. Stomach cells are said to contain more lysosomes than heart cells. This can be attributed to the fact that stomach cells are digestive in function than heart cells. Therefore, stomach cells need more lysosomes than heart cells because stomach cells are involved in digestive role.Learn more: https://brainly.com/question/13386978?referrer=searchResults
A 46F, presents to the ED d/t sudden-onset, severe occipital headache & nausea. PMHx is sig for HTN & smoking. PE shows mild disorientation but no focal weakness, sensory loss, or cranial nerve abnormalities. Non-Contrast CT reveals diffuse hyperdensity in the subarachnoid space. CT angio reveals a ruptured ACA aneurysm. The pt undergoes endovascular coiling of the aneurysm. Four days later, there is a sudden deterioration in her level of consciousness & new, right-sided hemiparesis is observed. Repeat CT shows no sig changes.
Which of the following is the most likely cause of this pt's neurological deterioration?
(Arterial thrombosis
OR
Embolism
OR
Vasospasm)
Answers
Endovascular coiling of the aneurysm is performed on the patient. Four days later, her degree of consciousness abruptly declines and new right-sided hemiparesis is noticed. Repeat CT reveals no changes in sig. The most likely reason for this patient's neurological decline is vasospasm.
When a blood vessel in the brain narrows, it causes vasospasm, which prevents blood flow. It could happen two weeks after a subarachnoid hemorrhage or a brain aneurysm. If you recently experienced a brain aneurysm rupture or subarachnoid hemorrhage, you are more likely to get a cerebral vasospasm.
Fever, stiff neck, minor confusion, speech problems, one-sided paralysis, and severely compromised consciousness are all indications of a cerebral vasospasm.
Vasospasm can occur upon waking from sleep, when experiencing tension or anxiety, or as a result of hyperventilating. Cocaine, amphetamines, anti-migraine medications, and herbal supplements like ephedra or bitter orange are just a few examples of legal and illicit substances that might cause it.
To know more about vasospasm
brainly.com/question/3589437
#SPJ4
An organism that carries a pathogen is called a __________. A. Pathogen B. Contaminant C. Fungus D. Vector Please select the best answer from the choices provided. A B C D.
Answers
Answer:
d
Explanation:
a vector is an organism carrying germs which are also called pathogen
Answer:
D
Explanation:
i did it before
What gives keratinocytes their name
Answers
which of the following models shows a correct set-up for a forked-line diagram of a rrpptt pea plant?
Answers
A forked-line diagram is a tool used to show the inheritance of genes in a population. In the case of a RRPPtt pea plant, the forked-line diagram would represent the possible offspring resulting from the cross between two parents with the alleles for the relevant traits.
The correct set-up for a forked-line diagram of a RRPPtt pea plant would have the two parents represented by their alleles on the top of the diagram, with lines branching off to represent each possible offspring. The alleles of each parent would be written as capital letters to indicate dominance, with lowercase letters representing recessiveness. In this case, the alleles represent the alleles for flower color (R = red, r = white) and seed shape (P = round, p = wrinkled).
The correct set-up would be as follows:
Parent 1: RRPP
Parent 2: rrpp
R r
P RRPp rrpP
p Rrpp rrpp
Each box in the diagram represents a possible offspring and shows the combination of alleles it inherited from each parent. The first box represents the offspring with the alleles RRPp, which would result from the cross between the parents. The second box represents the offspring with the alleles rrpp.
In this case, it is important to note that the offspring are not exact copies of the parents, but rather a combination of their alleles. This is because genes are passed down randomly during reproduction, leading to variations in the offspring.
In conclusion, the forked-line diagram is a useful tool for representing the inheritance of genes in a population and helps to predict the likelihood of different traits appearing in offspring. In the case of a RRPPtt pea plant, the correct set-up for a forked-line diagram would show the alleles of each parent on the top of the diagram, with lines branching off to represent each possible offspring and their combination of alleles.
To know more about inheritance: https://brainly.com/question/14930526
#SPJ4
What is the function of the macromolecule subunit below?
Answers
Answer:
C. Stores genetic information
Explanation:
The macromolecule shown in the image represents nucleotide as it consist of one phosphate, one pentose sugar, and one nitrogenous Base.
The nucleotides are found in Nucleic acids (DNA and RNA) that functions to store genetic information and transfer it to next generation. They are found in all living things on Earth.
Hence, the correct option is "C. Stores genetic information".
Answer:
c. stores genetic info
Explanation:
explain the relationship between energy from sunlight and the flow of matter into kelp.
Answers
Similar to plants on land, kelp uses sunlight's energy to produce its own nourishment. Photosynthesis is the name of this process. The plant absorbs sunlight and energy particles.
What function does the sun serve in the ecosystem of the kelp forest?In cold, nutrient-rich seas, kelp grows well. Kelp forests are always coastal and require shallow, somewhat clear water because kelp adheres to the seafloor and eventually grows to the water's top and depends on sunshine to produce food and energy.
What connection exists between kelp productivity and oxygen?Kelps are very young plants, but they extract enormous amounts of carbon from the atmosphere, a process known as "primary productivity." With the aid of sunshine and water, they convert atmospheric carbon dioxide into sugar fuel, releasing oxygen back into the atmosphere.
to know more about sunlight here;
brainly.com/question/6534510
#SPJ1
The mechanisms used by cells to ensure destruction of misfolded proteins include all of the following EXCEPT:
a) synthesizing ER-based molecular chaperones
b) phosphorylation of the protein eIF α
c) hydrolysis of the signal sequence
d) triggering of UPR
Answers
Option c) hydrolysis of the signal sequence is the mechanism that is not involved in the destruction of misfolded proteins.
The correct answer is option c) hydrolysis of the signal sequence. The signal sequence refers to a specific amino acid sequence at the N-terminus of a protein that directs it to the endoplasmic reticulum for proper folding and processing. Hydrolysis of the signal sequence is not involved in the degradation or destruction of misfolded proteins. Instead, the signal sequence plays a crucial role in protein targeting and translocation into the ER.
The other options listed are all mechanisms that cells employ to ensure the destruction of misfolded proteins. Cells synthesize ER-based molecular chaperones, such as BiP, to assist in protein folding and prevent aggregation of misfolded proteins. Phosphorylation of the protein eIF α is part of the integrated stress response and can halt general protein synthesis to allow the cell to cope with misfolded proteins. Triggering the unfolded protein response (UPR) is a cellular stress response that activates various pathways to restore ER homeostasis and, if unsuccessful, can lead to the degradation of misfolded proteins.
Learn more about protein synthesis here:
https://brainly.com/question/29763759
#SPJ11
Explain how sex-linked, codominant and incomplete dominant traits are passed on to offspring.
Answers
Sex-linked traits are genes carried on the sex chromosomes, the X and the Y chromosome. Only males carry the Y chromosome, and therefore all genes on the Y chromosome are passed down to the son. Women carry two X chromosomes; therefore, sex-linked traits can be passed on from both the mother and the father.
Examples of sex-linked traits include red-green colour blindness and haemophilia.
In codominance, both alleles are expressed in the phenotype of heterozygous offspring. The human ABO blood group is an example of codominance.
There are three alleles for the ABO gene: IA, IB, and I (i is recessive to both IA and IB). If an individual is heterozygous for both the IA and IB alleles, they will express both A and B antigens on their red blood cells. If they are homozygous for either IA or IB, they will express only one antigen on their red blood cells.
Incomplete dominance occurs when neither allele is dominant nor recessive, but instead, the phenotype is a blend of both. An example of incomplete dominance is the snapdragon flower, which has a red flower and a white flower. When the red flower is crossed with the white flower, the resulting offspring have pink flowers, which is a blend of red and white. The genotype for pink flowers is Rr, where R represents the red allele, and r represents the white allele.
When two pink flowers are crossed, their offspring will have a ratio of 1:2:1 of red, pink, and white flowers.
For more such answers on sex chromosomes
https://brainly.com/question/13125598
#SPJ8
The secretion of hormones by the pituitary gland is an example of _______________.
Answers
The secretion of hormones by the pituitary gland is an example of Endocrine Signaling.
What do you mean by Pituitary gland ?
The pituitary gland is a small pea-sized gland that plays a major role in regulating vital body functions.It regulates growth, metabolism, and reproduction through the hormones that it produces.It is located at the base of your brain below your hypothalamus.Endocrine signaling can be defined as a process where the cell targets a distant cell .It is released by one cell, then travels through the bloodstream to bind to receptors on a distant target.Hence, the answer is Endocrine Signaling.
To know more about Pituitary gland from the given link
https://brainly.com/question/1372599
#SPJ4
true/false. Genetic and environmental factors affect which traits are passed on from parent to offspring over generations and how they are passed on. Favorable traits for a given environment are passed on from parent to offspring. Unfavorable traits are selected against and inherited less frequently over time because they do not promote survival and rep
Answers
Answer: This is true.
Explanation: environmental factors often influence traits independantly of genes, but not always. Sometimes the evironment changes a gene, and that gene can be inherited, meaning it's passed on from a parent to a child.
MULTHI.E CHOICI. Choose the one alternative that best completes the statenaent or answers the questien. 1) Difficulty in swallowing may be a sign of damage to which cranial nerve(v)? 1) A) vagus B) glossopharyngeal and vagus C) facial D) hypoglossal E) glossopharyngeal 2) After suffering a blow to the back of the head, Phill loses his vision. The blow probably caused 2) damage to the A) occipital lobe. B) postcentral gyrus. C) limbic system. D) temporal lobe. E) frontal lobe. 3) Which of the following is a sympathetic neurotransmitter used for vasodilation? 3) A) norepinephrine B) dopamine C) nitric oxide D) serotonin E) acetylcholine 4) Which of the following associations is incorrect? 4) A) 5 sacral spinal nerves B) 1 coccygeal spinal nerve C) 8 cervical spinal nerves D) 5 lumbar spinal nerves E) 11 thoracic spinal nerves 5) The tough, fibrous, outermost covering of the spinal cord is the 5) A) dura mater. B) pia mater. C) coccygeal ligament. D) arachnoid mater. E) periosteum. 6) The nervous system stimulates the arrector pili muscles and gives you "goosebumps." A) somatic B) sympathetic C) parasympathetic D) afferent E) dorsal
Answers
The multiple-choice questions cover topics related to cranial nerves, brain regions, neurotransmitters, spinal nerves, and the autonomic nervous system.
The given questions are multiple-choice questions that cover various aspects of the nervous system. The first question addresses difficulty in swallowing, which could indicate damage to the vagus nerve (cranial nerve X). The second question relates to vision loss after a head blow, suggesting possible damage to the occipital lobe.
The third question asks about the sympathetic neurotransmitter used for vasodilation, with the correct answer being nitric oxide. The fourth question tests knowledge of the number of spinal nerves associated with each region, and the fifth question focuses on the outer covering of the spinal cord, which is the dura mater.
The final question asks about the stimulation of arrector pili muscles, which is accomplished by the sympathetic nervous system.
Learn more about sympathetic
brainly.com/question/29815857
#SPJ11
Solid water is less dense than liquid water. Explain the ecological significance of such a property when considering a small pond freezing over for the winter.
Answers
Answer:
When the process of freezing occurs within water, the air molecules within the hydrogen bonds will attract other oxygen bonds, creating a less dense substance.
Explanation:
An element has 2 valence electrons and 3 energy levels. It is located in
group
Answers
Answer: 3
Explanation:
All elements in group 3 have 3 levels of energy.
Na (sodium) has 3 valences the inner has 2 electrons, the middle has 8 electrons and the outer has 1 electron.
This will continue across the group 3 adding one more electron to the outer valence until Ar (argon).
Remember the Octet rule of 8..?
We have that for the Question " An element has 2 valence electrons and 3 energy levels. It is located in group" it can be said that its the
Group three(3)
From the question we are told
An element has 2 valence electrons and 3 energy levels. It is located in
group
Generally
We have that the energy level of three is synonymous to elements of group three
Therefore
Sodium has has a 3 valences which continues to add electrons to its outermost shell up untill the element Ar
Hence
its the Group three(3)
For more information on this visit
https://brainly.com/question/17756498
Aside from territory, food and water, what do horns on some male animals help them to compete for?
Answers
Answer:
Horns can help males compete for a mate during mating season.
As we all know that as humans we have many requirements to fulfill our needs. Aside from territory, food and water, horns on some male animals help them to compete for mates during the mating season.
What is mating season in animals?
Mating season in animals : Period of the year during which members of an animal species mate, typically adopting behavior characteristic of their species. Always we have to compete for resources to fulfill our needs, so as in some animals competition has occurred. This is seen each year when animals like red deer group together at the start of the mating season. Large male deer fight with each other by locking antlers and pushing hard, which is called a rut.So, aside from territory, food and water, horns on some male animals help them to compete for mates during the mating season.Learn more about red deer group
https://brainly.in/question/46755801?msp_poc_exp=1
#SPJ2
Examine the table for com yields in a farmland area over the course of several years. When corn is not in its growing season, farmers often cover the
crop field with a different species to prevent erosion or soil degradation.
Based on the data, what likely impacted the com growth over the three years shown here?
The presence of the rye grass increased the corn yield by decreasing competition with the weed species and preventing erosion.
The increased rainfall provided larger corn yields over the three years in the study.
The rotation of the crop with soybeans provided extra nutrients for the soil, increasing corn yields.
The lack of cover crop decreased competition for the corn, which increased its yields.
Answers
We can see here that the thing that likely impacted the corn growth over the three years shown here is: The presence of the rye grass increased the corn yield by decreasing competition with the weed species and preventing erosion.
What is corn?Corn, also known as maize, is a cereal grain that belongs to the grass family. It is one of the most widely cultivated and important staple crops in the world. Corn is native to the Americas and has been cultivated by indigenous peoples for thousands of years. Today, it is grown in various regions across the globe.
Corn plants typically have tall stalks with large leaves and produce ears that contain rows of kernels. These kernels, which can vary in color from yellow and white to blue and red, are the edible part of the plant.
Learn more about corn on https://brainly.com/question/397421
#SPJ1
How would the overfishing solution be implemented?
Answers
Answer:
Implementing the limit of the fish catch number is one of the best ways to reduce overfishing. By limiting the fish catch, the government and other organizations could help the fish population to recover and breed another fish. So the fish population will not extinct.
Explanation:
Describe the mammalian heart
Answers
Answer:
The heart is divided into four chambers consisting of two atria and two ventricles; the atria receive blood, while the ventricles pump blood. The right atrium receives blood from the superior and inferior vena cavas and the coronary sinus; blood then moves to the right ventricle where it is pumped to the lungs.