The correct option for the given question is d. the na channel becomes inactivated and refractory to reopening for a short time after the action potential passes. The action potential is a rapid change in voltage across the membrane of a cell which is associated with the passage of an impulse along a neural or muscle fiber.
The opening of voltage-gated Na+ channels causes depolarization, which is an increase in membrane potential, due to the inward movement of Na+ ions. A nerve impulse arises when an excitatory stimulus causes the neuron membrane to depolarize beyond the threshold potential, and Na+ channels open to cause a large influx of Na+ ions into the cytoplasm of the axon.
These ion channels can also inactivate and become refractory to reopening for a short time after the action potential passes. This phenomenon is known as refractoriness, which prevents the action potential from reversing its direction and returning to its origin.
The refractory period is the time it takes for the Na+ channels to reset themselves after depolarization and to allow new action potentials to be propagated in only one direction. Thus, the action potential propagates in only one direction by the Na+ channel becoming inactivated and refractory to reopening for a short time after the action potential passes.
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Why did I measure the initial mass of the dialysis tubes?
You
Most mammals have diploid body cells and haploid gametes. During __________, chromosomes from haploid gametes combine, and a __________ zygote is formed.
A.
implantation, diploid
B.
fertilization, haploid
C.
fertilization, diploid
D.
implantation, haploid
Answer:
C. or fertilization, diploid
the hunter aimed at the monkey with his blowgun and fired at the same instant as the monkey released its grip on the branch. the hunter will hit the monkey multiple choice question. only if the monkey was light. only if the monkey was heavy. regardless of whether the monkey was light or heavy.
The hunter will hit the monkey regardless of whether the monkey was light or heavy.
The outcome of the hunter hitting the monkey does not depend on the weight of the monkey. The key factor in this scenario is the timing of the hunter's shot in relation to the monkey releasing its grip on the branch.
If the hunter accurately aimed and fired at the same instant as the monkey let go, the projectile from the blowgun has a high chance of hitting the monkey, irrespective of its weight. The weight of the monkey does not affect the trajectory or speed of the projectile once it is released from the blowgun.
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What type of celestial object is the Sun?
Answer:
star????
Explanation:
bro???? the sun is also a star???
Which of the water reservoirs contains one percent of the water on Earth?
A) Lakes, rivers, and groundwater
B) Oceans
C) Polar ice caps and glaciers
D) Oceans and groundwater
Polar ice caps and glaciers are estimated to contain about one percent of the total water on Earth.The correct answer is: C) Polar ice caps and glaciers
These massive ice formations store a significant amount of the planet's freshwater in the form of ice. Polar ice caps are located near the North and South Poles, while glaciers can be found in various mountainous regions around the world. The slow movement of glaciers contributes to the continuous replenishment of freshwater resources. It's important to note that while this percentage represents a substantial amount of water, the majority of Earth's water is found in the oceans, which make up approximately 97 percent of the total water on our planet. Polar ice caps and glaciers, option C, contain approximately one percent of the water on Earth.
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I need help with this. It’s like I understand but I don’t .
That's kinda confusing...
But on another note why is there a dancing robot lol
why do chemical sedimitary rock form in areas that have high rates of evaperation
Explanation:
because they form due to precipitation of dissolved minerals. ... Thinking critically - The original concentration of dissolved minerals in a restricted ocean basin was enough to form only a thin evaporite layer.
what does the ozone layer do for us ? please help quickly !! will give brainliest
Answer:
It protects us from the sun's harmful unltrabiolet rays, by absorbing it. Which prevents hurting organisms and the Earth's surface.
Explanation:
Define heredity and give examples of some characteristics of heredity.
Answer:
heredity is defined as the characteristic we get genetically from our parents and our relatives before them. an example of heredity is a likelihood that you will have blue eyes. an example of heredity is your possibility of having cancer based on family history
Explanation:
Characteristics like eye colour, hair colour etc are examples of heredity.
What is heredity?The genetic-based heritage passed down to us from our parents is referred to as heredity. It can also be defined as traits transferred from one generation to the next one.
Blood groups and eye colour are common examples of these traits. Heredity can even transmit some diseases from the parents to the offspring. These are called hereditary diseases or genetic diseases. These diseases are usually non-curable.
These are genetic traits and a thus determined by the genes. Also, there are multiple variants of a single gene. These are called alleles. Every gene in our cells is present in 2 copies, except genes on sex chromosomes. These two copies can either be identical and be called homozygous, or they can be different and be called heterozygous.
The gene which is expressed as the phenotype is called dominant and the one which is not expressed is called recessive.
Therefore, heredity is the traits obtained from the biological parents.
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true or false? in a phylogeny branches are proportional to the amount of change and time between organisms.
The statement "in a phylogeny branches are proportional to the amount of change and time between organisms" is False.
The length of branches in a phylogenetic tree represents the degree of evolutionary divergence, but it does not always correspond to the amount of change or the time elapsed between organisms. The length of a branch in a phylogeny primarily represents the amount of genetic or phenotypic change that has occurred along that branch. Longer branches indicate greater divergence and more accumulated changes, while shorter branches indicate less divergence and fewer changes. However, the length of a branch can also be influenced by other factors, such as the rate of evolution, the presence of selective pressures, and the quality and availability of data used to construct the tree. Additionally, the concept of time is not directly depicted by the length of branches in a phylogeny. While a phylogenetic tree can provide insights into the relative timing of evolutionary events, the actual time scale is not represented by branch lengths unless specifically calibrated using molecular clocks or other dating methods. Therefore, it is incorrect to say that branches in a phylogeny are always proportional to the amount of change and time between organisms. Branch lengths are primarily used to indicate the degree of evolutionary divergence rather than being a direct measure of change or time.How does homeostasis play a role in everyday
activities?
Answer:
Homeostasis helps maintain your internal and external environment. which can help any activity. For example: If you plan to go to a cold ecosystem, homeostasis regulates your body temperature. There are many activities that in can help with everyday.
what is the difference between habitual and obligate bipedalism? a) define habitual and obligate bipedalism. and, b) identify at least three anatomical changes associated with obligate bipedalism.
a) Habital and Obligate Bipedalism are two different types of bipedalism which can be defined as:1. Habitual Bipedalism: It is a form of bipedalism that is not obligatory. Humans are an example of animals that practice habitual bipedalism.
This means that human beings are capable of walking upright or on two legs, but they also have the ability to walk on all four limbs.2. Obligate Bipedalism: It is the type of bipedalism that is mandatory. This is where the organism has to walk on two legs and cannot walk on all fours.
An example of an obligate biped is a bird.b) Here are three anatomical changes associated with obligate bipedalism:1. The Foramen Magnum Shift: The foramen magnum, which is the hole in the skull that the spinal cord passes through, moves to a more central position at the base of the skull, from a posterior location, so that the skull can balance on top of the spine while walking upright.
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The gravitational pull on planet A is greater than on planet B. Which of the
following best describes the mass and weight of an object that goes
from planet A to planet B? *
The mass and weight will be the same on both planets.
The mass will change, but weight will be the same.
The mass will be the same, but weight will change.
Both the mass and the weight will change.
Matter *
A. flows in one direction.
B. can move from living to nonliving components of ecosystems.
C. can move from nonliving to living components of ecosystems.
D. is made of atoms.
All are true of matter.
only B, C, and D are true of matter.
Answer:
i think it is only B, C, and D are true of matter
In DNA transformation, less harmful bacteria became harmful through mutation in rats. (True/False)
Answer:
False
Explanation:
it's answer is
how do enzymes affect chemical reactions in living organisms
Answer:
Enzymes are catalysts for chemical reactions in living things. Enzymes, like other catalysts, lower the activation energy and increase the rate of chemical reac- tions. ... This means that enzymes do not change the direction of a reaction— they just change the amount of time needed for equilibrium to be reached.
Explanation:
Enzymes do catalyze the reactions that occur in the living systems.
What are enzymes?We know that enzymes are biochemical catalysts that can be found in the body We know that the body is a large system that involves a lot of chemical reactions that are going on at almost the same time.
Now the enzymes are specific in their actions and they are able to fit into the substrate in a lock and key model such that they could lower the activation energy of the reaction and make the reaction to go faster.
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if one strand of dna has the sequence c-t-a-g-c-g-t-t-a, what sequence would appear opposite it on the other strand? enter the complementary sequence of letters separated by hyphens.
The sequence that would appear opposite to the given sequence on the other strand of DNA is G-A-T-C-G-C-A-A-T and the complementary sequence of letters separated by hyphens is G-A-T-C-G-C-A-A-T. The nucleotide bases in DNA can form base pairs in a particular manner such that each base pairs with the other.
In the double helix structure of DNA, the two complementary strands are held together by hydrogen bonds. The base pairs are A-T and C-G. The nucleotide sequence on one strand determines the sequence on the other strand.
If the sequence on one strand is given, we can easily find out the sequence on the other strand. The given sequence on one strand of DNA is C-T-A-G-C-G-T-T-A. The complementary base pair for C is G, for T is A, for A is T, and for G is C. Therefore, the complementary sequence for the given sequence is G-A-T-C-G-C-A-A-T.
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Why are there many types of creatures on the earth ?
Answer:
Just why some groups contain large numbers of species while others don't has long puzzled biologists. One of the main explanations has been geological age - older groups of organisms are more diverse because they have simply had more time to accumulate greater numbers of species.
Among all animals, ants outweigh us in biomass — putting billions and billions of tons up against humans' fewer than 500 million. And while they're both tiny and lacking a backbone, krill are the champs among animals worldwide, in terms of numbers, with a population estimated at 500 trillion.
FUN FACT:
7.827 billion
As of October 27, 2020, the world's human population is estimated to be 7.827 billion.
Explanation:
Brainliest?
Answer:
In all the time humans have been discovering and describing new species, we've probably only covered about a fifth of what's out there. A study in 2011 predicted there are some 8.7 million species on Earth, and we've identified maybe 1.6 million of them. Just why some groups contain large numbers of species while others don't has long puzzled biologists. One of the main explanations has been geological age - older groups of organisms are more diverse because they have simply had more time to accumulate greater numbers of species.
What are the basic processes which use the energy of respiration?
a. synthesis
b. mechanical
c. reproduction
d. tissue repair
e. maintenance
The basic processes which use the energy of respiration are synthesis, mechanical work, reproduction, tissue repair, and maintenance. All the given options are correct.
a. Synthesis: Energy derived from respiration is utilized for the synthesis of various molecules within the cell. This includes the production of complex carbohydrates, lipids, proteins, and nucleic acids necessary for cellular growth and maintenance.
b. Mechanical: Respiration-derived energy is utilized for mechanical work, such as muscle contraction, movement of cilia and flagella, and the movement of cellular structures like the cytoskeleton. Mechanical work is essential for various biological processes, including locomotion, cell division, and the movement of substances within cells.
c. Reproduction: Energy from respiration is required for reproductive processes, including gamete production, fertilization, and embryonic development. These processes involve the synthesis of new cells, tissues, and organs, all of which require energy.
d. Tissue Repair: Cellular respiration provides the energy needed for tissue repair and wound healing. Energy is utilized in the synthesis of new cells and extracellular matrix components, as well as in the cellular processes involved in tissue regeneration and remodeling.
e. Maintenance: Energy from respiration is utilized for the maintenance of vital cellular functions. This includes the active transport of molecules across cell membranes, maintaining ion gradients, protein turnover, DNA repair, and maintaining cellular homeostasis.
Overall, the energy derived from respiration is essential for a wide range of cellular processes, supporting growth, movement, reproduction, repair, and maintenance of cellular functions.
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What is another way in which human activity is increasing the amount of atmospheric CO2, and
what are potential global effects of these changes in CO2 levels?
Answer: What is another way in which human activity is increasing the amount of atmospheric CO2, and
what are potential global eWhat is another way in which human activity is increasing the amount of atmospheric CO2, and
what are potential global effects of these changes in CO2 levels?ffects of these changes in CO2 leWhat is another way in which human activity is increasing the amount of atmospheric CO2, and
what are potential global effects of these changes in CO2 levels?
Explanation:
What is another way in which human activity is increasing the amount of atmospheric CO2, and
what are potential global effects of these changes in CO2 leve
The mechanism of enzyme activity is called
Answer: Protein
Explanation: An enzyme attracts substrates to its active site, catalyzes the chemical reaction by which products are formed, and then allows the products to dissociate (separate from the enzyme surface). The combination formed by an enzyme and its substrates is called the enzyme–substrate complex.
What is p-waves and s-waves known as..?
Answer: P-waves are known as congressional waves and S-waves are known as secondary waves.
Explanation:
HELP!! What is the concentration of the solution if there is 13 grams of salt in 1 liter of water?
Answer:
1.3% of salt in 1 L of water
step:
first you need to covert them to the same unit.
lets use gram.
so 1 litter is 1000 gram
and the answer is 13/1000 or 0.013 or 1.3%
list 3 materials that contain the stored carbon
Answer:
Coal, oil, peat or natural gas
Which of the following substances must enter the cell through the cell membrane for the cell to live
A. Urea
B. Carbon monoxide
C. Nutrients
D. Carbon dioxide
Answer: C
The substance that must come through the cell membrane for the cell to live is nutrients. Cells would die if they did not get nutrients. Nutrients are what keeps the cell running.
How do populations respond to external stimuli?
Which statement best describes the overall change that occurs as a result of mitosis?
One cell becomes two cells that have identical copies of DNA.
One cell becomes two cells that have different copies of DNA.
Two cells become two cells that have identical copies of DNA.
Two cells become two cells that have different copies of DNA.
Answer:
One cell becomes two cells that have identical copies of DNA.
The statement that best describes the overall change that occurs as a result of mitosis is "One cell becomes two cells that have identical copies of DNA".
What is mitosis?Mitosis is a cell division, which results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.
This type of cell division can be found in tissue growth.
Thus, the statement that best describes the overall change that occurs as a result of mitosis is "One cell becomes two cells that have identical copies of DNA".
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What is the name for a large body of ice slowly moving across the land, pushing sand and rocks and changing the Earth's surface?
A glacier
B canyon
C volcano
D earthquake
Eggs are also similar to what other animal
Answer:
A chicken
Explanation:
Studies report that heredity has a strong influence on an...
Studies report that heredity has a strong influence on an individual's personality. How can this affect how positions are evaluated and advancements are allocated?
What are the implications of this influence in organizational settings?
An applicant is applying for a management trainee position and he/she is given a personality test that measures the five dimensions in the five-factor model. Which personality traits would you consider most important for this type of job? Explain your answer. (E.g., define what are the five factors, then go into detail as to which personality traits would be most important for this job. Use an example to typify your points).
Studies report that heredity has a strong influence on an individual's personality. The implications of this influence on organizational settings include how positions are evaluated and advancements are allocated.
Heredity can affect how employees work, communicate, and interact with each other, which can impact their career growth.Individuals who possess personality traits that are well-suited for management positions are more likely to advance in their careers. Some of the most important personality traits for a management trainee position are as follows: Conscientiousness: Individuals who score high on this dimension are dependable, responsible, organized, and hard-working.
A manager who is responsible for overseeing employees must be organized, reliable, and hard-working, making this trait particularly important.Emotional Stability: Individuals who score high on this dimension are calm, relaxed, and level-headed even in stressful situations. A management trainee position can be stressful, and a person who can maintain their composure in challenging situations is a valuable asset.Openness: Individuals who score high on this dimension are creative, imaginative, and open-minded.
They are skilled at building and maintaining positive relationships with others. A manager who can develop and maintain relationships with employees, clients, and other stakeholders is crucial to an organization's success.Extraversion: Individuals who score high on this dimension are outgoing, assertive, and sociable. A manager who is outgoing, assertive, and sociable will be better equipped to motivate and communicate effectively with employees.
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