you are estimating the time since the divergence of two species and used hemoglobin for your molecular clock. you would like to get independent support for your estimate. if you also use cytochrome c, which result do you expect?
The number of amino acid differences between the two species will be fewer for cytochrome c than for hemoglobin.
What can be utilized as a molecular clock to estimate the time since organisms diverged from a familiar?
A molecular watch uses DNA sequences (or the amino acid sequence of proteins that DNA encodes) to calculate how long it has been since related species separated from a common ancestor
Why does hereditary drift have more of an impact on the evolution of small peoples than large ones?
Small populations tend to lose hereditary diversity more quickly than large populations due to stochastic sample error (i.e., genetic drift). This is because some interpretations of a gene can be lost due to accidental chance, and this is more likely to occur when residents are small.
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Complete Question is,
a) The number of amino acid differences between the two species will be the same for both genes.
b) The number of amino acid differences between the two species will be fewer for hemoglobin than for cytochrome c.
c) The number of amino acid differences between the two species will be fewer for cytochrome c than for hemoglobin.
is area a statistical test
Answer:
A statistical hypothesis test is a method of statistical inference used to decide whether the data at hand sufficiently support a particular hypothesis.
Explanation:
What are the different aspects of statistical testing?
The null hypothesis test determines if the data’s values fall outside the range predicted through the null hypothesis. In this article, we will discuss the different aspects of statistical tests, including the selection of parametric and nonparametric tests to understand the statistical testing in detail.
How do you interpret statistical test statistics?
Interpreting test statistics For any combination of sample sizes and number of predictor variables, a statistical test will produce a predicted distribution for the test statistic. This shows the most likely range of values that will occur if your data follows the null hypothesis of the statistical test.
What is the p-value of a statistical test?
Statistical tests work by calculating a test statistic – a number that describes how much the relationship between variables in your test differs from the null hypothesis of no relationship. It then calculates a p-value (probability value).
What are the assumptions when selecting a statistical test for data?
Before selecting a statistical test for the collected data, it is important to meet certain assumptions and understand the types of variables used in the study. The first assumption about the data is that the observations or variables included in the data are not related.
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What does a human being , plants, mushrooms and fish have about them that makes them different
Answer:
biological differences such as, different appearances, and different functions. mushrooms are a fungi and they break down/decompose dead plants and such. fish eat algae and other fish. and humans eat plants, and animals. we all do different things. think about it can a mushroom walk, can a fish walk? humans breath air, mushrooms make air, and fish breath oxygenated H2O
Reactions that use energy to drive the synthesis of molecules inside the cell are most specifically considered.
Answer:
Anabolic
Explanation: easy question just study please
Systems biology is mainly an attempt to a. analyze genomes from different species. b. simplify complex problems by reducing the system into smaller, less complex units. c. understand the behavior of entire biological systems by studying interactions among its component parts. d. build high-throughput machines for the rapid acquisition of biological data.
Systems biology is mainly an attempt to:
a. analyze genomes from different species.
b. simplify complex problems by reducing the system into smaller, less complex units.
c. understand the behavior of entire biological systems by studying interactions among its component parts.
d. build high-throughput machines for the rapid acquisition of biological data.
Option c) is the correct option.
What do you understand by Systems biology?
Systems biology is responsible for some of the most important developments in the science of human health and environmental sustainability. It is a holistic approach to deciphering the complexity of biological systems, based on the understanding that the networks that make up the whole of living organisms are more than the sum of their parts. It collaborates, integrating many scientific disciplines—biology, computer science, engineering, bioinformatics, physics, and more—to predict how these systems change over time and under different conditions, and to develop solutions to the world's most pressing health and environmental problems.To learn more about Systems biology, refer to:
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After surgical removal of an infected gallbladder, a person must be especially careful to restrict dietary intake of a. starch. b. protein. c. sugar. d. fat.
d. fat The removal of the gall bladder will have an influence on the generation of bile, which will affect fat digestion because bile is essential for breaking down large fat molecules and commencing digestion.
What are the risks of having one's gallbladder removed?Leakage of bile
However, once the gallbladder is removed, bile fluid may occasionally flow into the belly (abdomen). Belly ache, feeling nauseous, a fever, and a distended tummy are all symptoms of a bile leak.
After gallbladder surgery, eating the incorrect foods can cause discomfort, bloating, and diarrhoea. To avoid stomach discomfort, avoid high-fat or spicy meals such as French fries and potato chips. Meats high in fat, such as bologna, sausage, and ground beef
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Which of the following is not an accurate statement? a. Hormones are chemical messengers that travel to target cells through the circulatory system. b. Hormones often regulate homeostasis through antagonistic functions. c. Hormones of the same chemical class usually have the same function. d. Hormones are often regulated through feedback loops.
The following is not an accurate statement
c. Hormones of the same chemical class usually have the same function.
Usually, the function of hormones belonging to the same chemical class is the same.
Chemicals called hormones function as messenger molecules that travel through the bloodstream. From the glands where they are created to cells in various regions of the human body, hormones convey chemical information. The cellular mechanisms that regulate stress, appetite, growth, sleep cycles, blood sugar can be turned on or off by these chemical messengers.
Hormones play a crucial role in the body's ability to operate properly. They regulate how the organs work and have an impact on their development, sexuality, and reproduction.
In addition, hormones have an impact on how the body consumes and stores energy as well as controls fluid balance and blood sugar and salt levels.
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Based on the tree below, which statement is not correct? a. The salamander lineage is a basal taxon. b. Salamanders are a sister group to the group containing lizards, goats, and humans. c. Salamanders are as closely related to goats as to humans. d. Lizards are more closely related to salamanders than to humans.
The statement that is not correct is that lizards are more closely related to salamanders than to humans.
What are lizards?Lizards belong to the group of reptiles that belongs to the animal kingdom that share an ancestor with snakes. They are animals that have a long body and skin covered with lamellae like scales. Among the lizards we know are iguanas, chameleons, lizards, and geckos.
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Based on the tree below, which statement is not correct?
a. The salamander lineage is a basal taxon.
b. Salamanders are a sister group to the group containing lizards, goats, and humans.
c. Salamanders are as closely related to goats as to humans.
d. Lizards are more closely related to salamanders than to humans
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Some disease-causing microbes attack the body by turning on or off specific signal transduction pathways. In the disease cholera, the bacterium vibrio cholerae causes massive diarrhea by interfering with such a pathway. A toxin from this bacterium enters intestinal cells and chemically modifies g proteins. Once modified, the g proteins can no longer cleave gtp into gdp. What would you expect to see within the intestinal cells of a person with cholera?.
The G proteins in the interstitial cells of a person with cholera remain activated and continually activate adenyl cyclase.
Signal transduction pathways allow binding of extracellular signalling molecules (like epinephrine) to the cells to respond to environmental signals of any stress like attach of a pathogen. The adrenal glands release a hormone called epinephrine in response to the disease-causing microbes. These hormones attach to the receptors on the cell surface and promote a response. The disease causing microbes turn this pathway on to respond to the attack.
Vibrio cholerae is a gram-negative bacteria that causes cholera in humans. It affects the interstitial cells of the small intestine by producing a toxin called choleragen. Choleragen attaches to the cell membrane and traps the G-protein in its active state. Active G-protein activates adenyl cyclase that stimulates the production of cyclic AMP molecules. cAMP activates protein kinase A (PKA) that activates chloride-ion channels and blocks sodium-hydrogen antiporters. This results in the loss of sodium chloride and water into the lumen and causes watery diarrhea.
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The medicinal use of foxglove to make the drug digoxin (lanoxin) is an example of a modern drug derived from ________. a. an animal b. a mineral c. a plant d. a trace element
The medicinal use of foxglove to make the drug digoxin (lanoxin) is an example of a modern drug derived from a plant and is denoted as option C.
What is Foxglove?This refers to a herbaceous perennial plants which has tubular blooms comprising of different colors and are important due to its health benefits in the body.
This plant is used in the production of drugs such as digoxin which is very effective in the treatment of different types of heart diseases. Since foxgloves have features such as root, flowers etc then it is a plant and is the reason why it was chosen as the correct choice.
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Having a complete set or sets of chromosomes is called ________. euploid diploid aneuploidy monoploid ploidy
Having a complete set or sets of chromosomes is called euploid
aneuploidy is a circumstance that exists when an organism gains or loses one or greater chromosomes but now not a whole haploid setThe failure of one or extra pairs of homologous chromosomes or sister chromatids to separate usually during nuclear division, commonly ensuing in an bizarre distribution of chromosomes within the daughter nuclei. is known as non disjunction. Nondisjunction at some point of either meiosis I or II within the female gameteMonosomy s the precise term that describes the loss of a single chromosome (2n - 1)Aneuploidy is the condition that exists when an organism gains or loses one or more chromosomes but now not a entire haploid setTo know more about euploid visit : https://brainly.com/question/22271293
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Nadh and fadh2 carry high energy electrons from the other stages of respiration to the electron transport chain. What does the electron transport chain use these electrons to do?.
Some of the energy of the high-energy electrons is captured as they travel along the chains. This energy is used to move hydrogen ions (from NADH and FADH2) from the matrix into the intermembranous region through the inner membrane.
The last phase of aerobic respiration is electron transport. In this phase, energy from the Krebs cycle products NADH and FADH2 is converted to ATP.
NADH and FADH2 release high-energy electrons that travel through electron transport chains similar to those utilized during photosynthesis. The electron transport chains are located on the inner membrane of the mitochondrion. Some of the energy of the high-energy electrons is captured as they travel along the chains. Hydrogen ions (from NADH and FADH2) are pumped over the inner membrane and into the intermembrane space using this energy.
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Which of the following best describes the logic of scientific inquiry? a. If I generate a testable hypothesis, tests and observations will support it. b. If my prediction is correct, it will lead to a testable hypothesis. c. If my observations are accurate, they will support my hypothesis. d. If my hypothesis is correct, I can expect certain test results.
If my hypothesis is correct, I can expect certain test results. It describes the best logic of scientific enquiry.
What best represents the methodology of scientific research?The six steps of the scientific method are as follows: 1) asking a question about what you see, 2) doing background research to find out what is known about the subject, 3) formulating a hypothesis, 4) conducting experiments to test the hypothesis, 5) analyzing the results of the experiment, and 6) coming to conclusions.
There is an example of scientific enquiry that is to determine how four fertilizer affect the growth rate of bean plants. So, the option d will be correct.
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If an enzyme is inhibited by a substance that binds away from the active site this substance must be?
If an enzyme is inhibited by a substance that binds away from the active site this substance must be an allosteric inhibitor.
What is an allosteric inhibitor?An inhibitor is a substance that prevents an enzyme from acting. The inhibitor may or may not bind to the active site of the enzyme. Hence not all the inhibitors binds to the active site.
If an enzyme is inhibited by a substance that binds away from the active site this substance must be an allosteric inhibitor.
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What does an ecosystem contain that a community does not?
OA. Biotic factors
OB. Multiple species
OC. Abiotic factors
OD. Multiple organisms
SUBMIT
An ecosystem includes both biotic (living) and abiotic (non-living) factors such as water, air, soil, temperature, and sunlight, whereas a community refers only to the multiple species of living organisms in a particular area. The correct option is C.
What is an ecosystem?An ecosystem is a region where a bubble of life is created by plants, animals, and other organisms interacting with the weather, environment, and other factors. Abiotic variables, or nonliving components, coexist with biotic components in ecosystems. Plants, animals, and other species are biotic factors.
An ecosystem contains abiotic factors that a community does not. An ecosystem includes both biotic factors (living organisms like plants, animals, and microorganisms) and abiotic factors (non-living elements like temperature, water, sunlight, and soil).
In contrast, a community only consists of the various interacting species (biotic factors) within a specific area, without considering abiotic factors.
Therefore, the correct option is C.
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Plants use statoliths to detect gravity (see Figure 39.22). How do plants and animals differ with regard to the type of compartment in which statoliths are found and the physiological mechanism for detecting their response to gravity?
In animals, detection is done by mechanoreceptors on hair cells. In plants, this mechanism seems to involve calcium signaling.
Briefing:In animals, the statoliths are extracellular. In contrast, the statoliths of plants are found in an intracellular organelle. Their location detection methods are also different. In animals, detection is done by mechanoreceptors on hair cells. In plants, this mechanism seems to involve calcium signaling.
What is the statoliths in plants?A group of membrane-bound starch granules (see amyloplast) in plant cells is thought to act as a gravity sensor. Starch stators are found in root tip cells and tissues near the vascular bundle of shoots; Under the action of gravity, they sink to the bottom of the cell.
What is the function of statoliths?The statoliths are thought to regulate the transport of the growth hormone, auxin, by acting on specific auxin transporters, the PIN proteins.
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5.if a farmer sprays a pesticide onto a field and kills half of the insect pests, he has caused a reduction in________.
If a farmer sprays a pesticide onto a field and kills half of the insect pests, he has caused a reduction in population size.
The number of organisms of a particular species in an area is referred to as the population size. Each species of organism present in an area will have a different population size.
A species that has better traits to adapt to an ecosystem will have a greater population size.
A pesticide is a substance that is used to kill pests. Farmers use pesticides in their fields to protect crops from pests such as insects.
If a farmer sprays a pesticide that reduces the insect pest population to half, then this means that the population size of the insect pest has reduced.
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this biome contains plants that are adapted to prevent water loss due to the low average rainfall and high temperatures year-round. savanna savanna boreal forest boreal forest tropical rain forest tropical rain forest desert
The biome that contains plants that are adapted to prevent water loss due to the low average rainfall and high temperatures year-round is desert (option D).
What is a desert?A desert is a barren area of land or desolate terrain, especially one with little water or vegetation.
A desert is characterized by the relatively low amount of rainfall and intense temperature per year, hence, there is little growth of plant life.
The few plants that are adapted to survive in the desert or arid region are specially equiped to do do. Some of the structural adaptations to desert conditions by plants are as follows:
Waxy cuticleReduction of leaves to spines Deep tap rootsTherefore, the biome that contains plants that are adapted to prevent water loss due to the low average rainfall and high temperatures year-round is desert.
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Protein channels that are situated between cells create small pores for the passage of small substances are known as?
According to the research, the correct option is gap junctions. Protein channels that are situated between cells create small pores for the passage of small substances are known as gap junctions.
What are gap junctions?They are molecular complexes made up of connexins as channels or connection structures between cells that allow the passage of small molecules and electric current.
In this sense, these channel structures formed by proteins allow the adaptive responses of differentiated cells and the synchronization of cell function, the transmission of the electrical impulse, among many other biological activities.
Therefore, we can conclude that according to the research, the correct option is gap junctions. Protein channels that are situated between cells create small pores for the passage of small substances are known as gap junctions.
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What do many of the regulators of complement activation (rcas) that ensure c3b is deposited on the surface of pathogens and not on the surfaces of healthy host cells and tissues contain?
The regulators of complement activation is Complement control protein (CCP) modules
This is further explained below.
What are tissues?Generally, A collection of cells that have a similar structure and work together to perform a certain job is called a tissue.
The gaps in between the cells are filled with an inorganic substance that is referred to as the intercellular matrix. It's possible that certain tissues have a lot of this, while others have very little.
a live cell that has been invaded by an infectious agent or is capable of being invaded by such an agent
The pathogen, in the original and largest use of the word, refers to any organism or agent that might cause illness.
The CCP modules responsible for this are part of the immune system. In addition to "germ," "infectious agent," and "pathogen" are all terms that may be used to describe the same thing.
In the 1880s, researchers studying the complement system coined the word "pathogen."
In conclusion, The complement system is activated by certain components of complement control protein (CCP).
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When a hospital-physician relationship is established, a physician becomes part of the medical staff based on what criteria?
A physician becomes part of the medical staff based on the successful completion of a prescribed credentialing process.
A physician, also known as a medical practitioner, medical doctor, or simply a doctor, is a person who works in the medical field. When a hospital-physician relationship is established, a physician becomes part of the medical staff.
Medicine is the study, diagnosis, prognosis, and treatment of illness, injury, and other physical and mental impairments to promote maintain, or restore health. In general practice, doctors take on the role of providing ongoing and comprehensive medical care to people, families, and communities, while focusing their practice on certain disease categories, patient types, and treatment modalities (known as specialties).
To practice medicine effectively, one must have a thorough understanding of the academic fields, such as anatomy and physiology, underlying disorders, and how to treat them—the science of medicine—as well as a respectable level of proficiency in the art or craft of medicine.
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The human nature level of personality analysis addresses how every human being is, in certain respects, ________.
The human nature level of personality analysis addresses how every human being is, in certain respects like all others.
What is the human nature?In psychology, the human nature has to do with the generality of the attitudes that make us human. This includes the ideologies and the tendencies that underlie our shared humanity.
Hence, the human nature level of personality analysis addresses how every human being is, in certain respects like all others.
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On average, all cells are approximately the same size whether they are found in elephants or beetles. what is the best explanation for why cells are so small?
The best explanation for why cells are so small in all organisms regardless of the taxonomic group is that this size optimizes homeostasis by the exchange of nutrients and waste products with the media.
Why cells are so small?The cells are so small in all organisms regardless of the species because they need to optimize the exchange of material with the surrounding environment, which allot to maintain the state of internal equilibrium.
In conclusion, the best explanation for why cells are so small in all organisms regardless of the taxonomic group is that this size optimizes homeostasis by the exchange of nutrients and waste products with the media.
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A substance that is recognized as foreign or nonself is? 1. immunoglobulins. 2. lymphocytes 3. antibodies. 4. antigens
A substance that is recognized as foreign or non-self is antigens; option 4
What is the immune system?The immune system is a system in the body whose primary function is to defend the body against attack or invasion from foreign agents which are more likely than not to cause diseases.
In some instances though, some foreign agents recognized by the body may not be disease-causing agents.
The components of the immune system include the following:
immunoglobulinslymphocytesantibodiesAntibodies are proteins that protect you when foreign agents enters your body. Antibodies usually bind to antigens which are foreign substances.
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20pts i need this for an essay.
Think about the role of both biotic and abiotic factors within an ecosystem.
Describe a scenario in which one abiotic or biotic factor is added or removed from an ecosystem.
Explain the possible side effects on that ecosystem.
Be sure to –Address the prompt, provide support, and conclude your thoughts.
Answer:One abiotic factor that could have a side affect on the ecosystem is air.One biotic factor that would have side effect on the ecosystem would be plants.
Explanation:
How can an enzyme cofactor needed for a process that is vital to all animals be an essential nutrient (vitamin) for only some?
All creatures need the cofactor, so those that don't need it in their food must be able to make it from other organic molecules.
What is cofactor?A cofactor is a chemical or metallic ion that is not a protein and is necessary for the catalytic function of an enzyme (a catalyst is a substance that increases the rate of a chemical reaction). Cofactors are characterized as "helper molecules" that speed up biological processes. Enzyme kinetics is a field of study that focuses on characterizing the rates at which things occur. In contrast to ligands, cofactors frequently derive their function from staying bound. Inorganic ions and sophisticated organic compounds known as coenzymes are the two main categories of cofactors. In modest levels, coenzymes are mostly derived from organic vitamins and other vital elements.Learn more about the cofactor with the help of the given link:
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What are chemical messengers that diffuse through tissue fluid and affect only nearby cells called?
Chemical messengers that diffuse through tissue fluid and affect only nearby cells are called paracrine.
In the field of science, paracrine can be described as cell signaling molecules that are produced in a cell and affect the nearby cells without having the requirement to be transported through the blood.
As paracrine travel through tissue fluids hence it can induce changes in nearby cells only, unlike the hormones, which travel long distances through the blood. Hence, paracrine is involved in the creation of local action. There are certain receptors and pathway system that is followed by the paracrine in order to cause a reaction in the nearby cells.
Examples of paracrine chemical messengers include growth factors or clotting factors.
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Why can only some patients with diabetes insipidus be treated effectively with ADH?
A patient with untreated diabetes insipidus has hyposecretion of ADH due to damage to person's hypothalamus or pituitary gland.
What is hyposecretion?An endocrine gland's hyposecretion is frequently brought on by the death of its hormone-secreting cells. As a result, insufficient amounts of the hormone are released. Type 1 diabetes is an illustration of this, in which insulin-secreting pancreatic cells are attacked and destroyed by the body's immune system. Insulin injections are typically used to treat this kind of diabetes.
Why is ADH only beneficial for some patients with diabetic insipidus?As ADH is produced by the brain's hypothalamus and kept in the posterior pituitary gland. The amount of water is constantly balanced and regulated by ADH. When ADH is disrupted, the kidneys eliminate too much fluid from the body, increasing urine output and urination. Blood sugar levels in diabetes insipidus are normal.
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What would happen if all of the hemoglobin contained within the rbcs became free in the plasma?
If all of the hemoglobin contained within the RBCs became free in the plasma, it would significantly increase blood osmolarity; option D.
What is osmolarity of a solution?The osmolarity of a solution is a measure of the number of particles present in a given volume of solution.
Osmolarity is a measure of the concentration of particles in a given solution.
An increase in dissolved particles will raise the osmolarity of a solution.
In the cell, proteins, ions, and carbohydrates contributes to the osmolarity of the cell.
Hemoglobin is a protein which is found within the red blood and whose function is to transport oxygen in the body.
Therefore, if all of the hemoglobin contained within the RBCs became free in the plasma, the osmolarity of plasm will increase.
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Note that the complete question is given below:
What would happen if all of the hemoglobin contained within the RBCs became free in the plasma?
a)It would considerably increase blood oxygen carrying capacity.
b)It would facilitate delivery of oxygen into tissues supplied by small capillaries.
c)It would facilitate oxygen diffusion into cells distant from blood capillaries.
d)It would significantly increase blood osmolarity.
e)It would drastically increase osmotic colloid pressure.
Hodgkin and huxley proposed that sodium was the predominant ion associated with the firing of an action potential because?
Hodgkin and huxley proposed that sodium was the predominant ion associated with the firing of an action potential because the membrane potential approaches the Na+ Nernst potential during the rising phase.
In 1952, Hodgkin and Huxley proposed that sodium was the predominant ion associated with the firing of an action potential. This was based on their observation that the membrane potential approaches the Na+ Nernst potential during the rising phase of the action potential.
Since then, many studies have confirmed that Hodgkin and Huxley were correct in their proposal. Sodium ions play a vital role in the firing of action potentials and are responsible for the fast depolarization phase of the action potential.
Without sodium ions, action potentials would not be able to propagate along axons and nerves would not be able to transmit signals. This discovery has helped to further our understanding of how the nervous system works and has laid the foundation for subsequent research in this field.
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