At label ________, the cell is not hyperpolarized; however, repolarization is in progress, as the sodium channels are inactivated or becoming inactivated, and many potassium channels have opened.
Answers
Answer: C
Explanation:
When a neuron receives a stimulus, the sodium channels present in the membrane are opened, and therefore Na+ enters the cell in favour of the concentration gradient, so that the membrane potential changes to positive by means of ion exchange, producing depolarization. If this depolarization reaches a certain threshold value, an action potential is generated. The next step is the opening of the potassium channels and the inactivation of the sodium channels, so that the repolarization of the membrane takes place. The sodium channels, will return to the closed state in the hyperpolarization to continue in this state during all the rest potential achieving the action potential to return to -70 mV (repolarization).; until the arrival of a new action potential which produces the activation and opening of the sodium channels, repeating the cycle again and generating a new depolarizing action. This process is part of the synaptic transmission.
So, hyperpolarization is any change in the cell's membrane potential, which makes it more polarized. This means, hyperpolarization is an increase in the absolute value of the cell's membrane potential. Thus, changes in membrane voltage where the membrane potential is more distinctly positive or negative are hyperpolarizations.
During the repolarization period after an action potential, the membrane potential is more negative than when the cell is in "rest period". In the picture, this repolarization period is about 1-2 milliseconds. So, repolarization is the time in which the membrane potential is hyperpolarized with respect to the resting potential.
In the attached figure, part C indicates this repolarization period.
Related Questions
I’LL GIVE A BRAINLIEST IF YOU ANSWER QUICKLY!!!
Write a CER to answer the question below.
2. Explain how the chemical properties of water and the characteristics of the water cycle allow for plants to acquire the nitrogen necessary to grow in the experiment
above. Use the following terms in your answer:
-polar, dissolve, cohesion, evaporation
Answers
Answer:
Explanation:
Aquifers are groundwater reservoirs often tapped by wells. Water: Water is pretty darn important for living things.
You are overseeing a paleontological expedition at the Grand Canyon to uncover fossils. You have one group working about 10 feet above the bottom of the canyon,
uncovering a cluster of Brachiopods You have a second group working about 300 feet above the bottom of the canyon, uncovering impressions from a variety of plants
such as fems and horsetails. While you are waiting for the exact age of the rock layers to be determined, what can you tell about the age of the fossils based on
where they are
A. You cannot determine anything yet.
B. They are all about the same age.
C. The plants must be older than the Brachiopods.
D. The Brachiopods must be older than the plante
Answers
Answer:
C
Explanation:
because the plants are farther down lol
Paleontology establishes the geological age of the organisms. Based on the height of the fossils discovered at the Grand Canyon, it can be concluded that plants were older than the Brachiopods. Thus, option C is correct.
What are fossils?The dead remains and decaying materials of the plants and animals stored and preserved under the sediments and rock layers over a period of many years are said to be called fossils.
The fossils are evidence of the evolution as well are used to determine the geological age of the species based on their occurrence of them in the rock layers.
The fossils of plants like horsetails and ferns were found 300 ft above the Canyon while Brachiopods at 10 feet above Canyons that tell that plants were found earlier than the former species.
Therefore, option C. the plants existed prior to the Brachiopods.
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Before Pasteur's experiments using beef broth and flasks with S-shaped tubing, most people thought that new cells formed by____
Answers
Answer:
spontaneous generation
Explanation:
Spontaneous generation is the idea that living organisms arise from nonliving matter. Louis Pasteur was a French chemist who designed a series of experiments to determine whether a sterile nutrient broth could spontaneously generate microorganisms. He added nutrient broth to two flasks, curved their necks into S shapes, and finally boiled the broth to eliminate any potential microorganism. Pasteur did not observe any microorganisms in the flasks with the S-shaped necks, thereby showing that microorganisms present in the air were responsible for contaminating nonliving material and thus rejecting the idea of spontaneous generation.
What is a major difference between these two types of cells?
The location of the cytosol
The location of the DNA
The presence of a plasma membrane
The presence of ribosomes
Answers
Answer:
I think the answer is the presence of a plasma membrane.
Answer: Location of the DNA :)
Which of the following is an example of homoplasy? Which of the following is an example of homoplasy? hair in humans and fur in bear streamlined bodies in dolphins and ichthyosaurs Hox genes in humans and sea stars astragalus ankle bones in camel and pig
Answers
Answer:
streamlined bodies in dolphins and ichthyosaurs
Hope this helps! （づ￣3￣）づ╭❤～
What results if a broken chromosomal fragment becomes reattached as an extra segment to a sister or non-sister chromatid? A Duplication B Inversion C Polyploidy D Nondisjunction
Answers
Answer:
The correct answer is option A "Duplication".
Explanation:
Chromosomal duplication is defined as a type of rearrangement of genetic material at which extra copies of a DNA fragment are created. In this case if a broken chromosomal fragment becomes reattached, this fragment will represent an extra copy, and therefore the resultant genetic material is considered a chromosomal duplication.
Which cycle is represented in this image?
Answers
Answer:
it is clearly the oxygen cycle
Answer:
ofrfr
Explanation:
Compare and contrast James’s public school experience with his mother’s public school experience. Identify at least two similarities and two differences in their experiences.
Answers
I inferred you are referring to the Characters of the book "The Color of Water".
Explanation:
James and his mother Ruth both attended public schools, however, his mum experienced a racially divided public school environment.
However, because they were Jews, his mum chose a public school attended predominantly by Jewish students. In a sense, he experienced lesser discrimination since he was surrounded by those like him.
Question 4
What happens to the host cell at the end of the lytic cycle?
the cell breaks open and releases the new viruses
viral DNA combines with host DNA
the host cell divides normally and reproduces viral DNA along with it's own
new viruses are made inside the bacterial cell
Answers
Answer:
In the lytic cycle, a phage acts like a typical virus: it hijacks its host cell and uses the cell's resources to make lots of new phages, causing the cell to lyse (burst) and die in the process.
Explanation:
Hope this helps.
what are the challenges faced by the role of climate on crop production?
Answers
Answer:
Climate on crop production contribute to the greenhouse effect and climate change and impacts on agriculture production.
Explanation:
Crop production of climate change is likely to change food security in the future, all people and economic to sufficient and safe an active life.
Climate change is to contribute to food prices and food production, and expensive climate change increase energy prices,production may increased crop water and suitable production.
Agriculture and food product system is a major process source of gas,could increase products,yield of crop restricted by the extreme events.
Productivity can also effects on the immune system them certain diseases,in animals are productivity and fertility.
Crop level to climate change is expected be in future changing crop irrigation practices,crop production under global change.
Climate change extreme events have been and strategies suggest to help maintain production and restoring farm type, crop, food systems, crop that stress tolerance.
Why is milk pack showing green tag, its a animal product so it should show red tag right?
Answers
Because milk is vegetarian and vegetarian food and drinks are shown with a green tag to make people aware that it's vegetarian!
That's my opinion! :)
state the effect of the heat on plastic and Alcohol
Answers
Answer: When the heat hits the plastic it starts to soften up and loose stiffness in it, but with alcohol it can cause serious consequences, drinking alcohol can cause more urination and lead to dehydration.
Explanation:
Answer:
the heat melts the plastic or softens it, which causes it to change shape.
alcohol changes taste and has a faster evaporation rate. If a person drinks warm alcohol he would start to lose more body water, he will perspire and urinate more.
;D hope this helps
proteins have a function in
a. giving form to the cell b. providing stored energy and directing movement within a cell C. providing a scaffold for chemical reactions to take place d. catalyzing chemical reactions within a cell e. all of the above. friend thinks e but i wanna make sure
Answers
Answer:
c
Explanation:
Besides antibodies _________ are made after an active immune response.
1 point
Macrophage
Complement proteins
Antigen
Memory cells
Answers
Answer:
Memory cells
Explanation:
Active immunity is defined as immunity to a pathogen that occurs following exposure to said pathogen. When the body is exposed to a novel disease agent, B cells, a type of white blood cell, create antibodies that assist in destroying or neutralizing the disease agent.
A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the laboratory. Which statement best provides evidence that the substance is a mutagen? -The cells die within hours of being exposed to the chemical. -The cells grow more quickly than those that were not exposed to the chemical. -The cells change after being exposed to the chemical, and this change is passed to the next generation of cells. -The cells continue to divide at the same rate as before they were exposed to the chemical.
Answers
Answer:
The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
Explanation:
Mutation is a process that occurs from time to time to the genetic material of living cells. Mutation is a change in the nucleotide sequence of a DNA or gene. It is usually caused by errors during replication or induced by an external substance called MUTAGEN.
A mutagen is any substance that causes mutation in an organism. Hence, according to the question, the chemical substance which is thought to be a mutagen will change the cells after being exposed to the chemical, and this change is passed to the next generation of cells.
N.B: Since mutation affects the gene, it is passed on to the offsprings during reproduction.
Answer:
its c did the test
Explanation:
Chylomicrons A. are synthesized in intestinal epithelial cells. B. enter capillaries in the small intestine. C. help emulsify fats. D. are a rich source of carbohydrate. E. are synthesized in the lumen of the small intestines.
Answers
Answer:
E
Explanation:
I don't know. How Supposed to help you
Chylomicrons are synthesized in intestinal epithelial cells to transport long-chain triglycerides to the tissues. Therefore, option (A) is correct.
What are chylomicrons?Chylomicrons are lipoprotein particles made up of triglycerides, phospholipids, cholesterol, and proteins. They are also known as extremely low-density lipoproteins. They move dietary lipids from the intestines to other bodily parts.
Chylomicrons deliver lipids ingested from the gut to the adipose, cardiac, and skeletal muscle tissues, where their triglyceride components are digested by the action of the lipoprotein lipase, releasing the free fatty acids that may then be absorbed by the tissues.
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i don’t know how to answer this question
Answers
animalia= insect
plantae= cactus
The answers are:
fungi = basidiomycota
animalia = insect
plantae = cactus
What are fungi?A fungus is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms.
Many people mistakenly believe fungi are plants. However, fungi are neither plants nor animals but rather organisms that form their own kingdom of life. The way they feed themselves is different from other organisms: they do not photosynthesize like plants and neither do they ingest their food like animals.
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Which process that causes changes in Earth's orbit was found to coincide with 100,000-year glacial cycles? Answer Options: A. Axial precession B. Precession of the ecliptic C. Apsidal precession D. Obliquity
Answers
Answer:
Apsidal precession
Explanation:
Apsidal precession is the process that causes changes in Earth's orbit and was found to coincide with 100,000-year glacial cycles. Thus, the correct option is C.
What is the Glacial cycle?The glacial cycle may be defined as a significant global climatic oscillation of the order with a specific rate that is developed by the ice age.
Apsidal precession is the precession of the line that links the apsides of an astronomical body. The regular cycle of apsidal precession takes about 100,000-year.
Therefore, the correct option for this question is C.
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In a cladogram (a type of phylogenetic tree), clades are groups of related organisms. In the past, phylogenetic lists built clades using the idea of parsimony, that the pattern that uses the fewest evolutionary changes is the most likely to be correct. Today, with the use of computers and DNA sequences, the explanation that is thought to be the best is ___________ .
Answers
Answer:
one with the fewest number of genetic differences in the nucleotide sequence.
Explanation:
A cladogram is a diagram capable of showing the relationships among different species and/or group of organisms. In a cladogram, the root indicates the common ancestor, while internal nodes represent the common ancestors of each group. In consequence, this diagram can be used to establish evolutionary relationships in which the start branch points represent common ancestors shared by the organisms found in the 'branches'. Nonetheless, the length of the branches in the cladogram does not represent evolutionary distances among groups. In recent years, cladograms based on DNA sequencing data have been combined with morphological data to establish evolutionary relationships among species.
Which of the following would ATP NOT be used for as energy? A. Healing a cut B. Osmosis C. Push ups D. Keeping warm
Answers
Answer:
B. Osmosis
Explanation:
Answer: B: Osmosis
Explanation: Since osmosis is a simple diffusion it does not require ATP.
How do postprocessual archaeologists approach an artifact? A. They try to discover the time period the artifact came from. B. They seek to derive meaning from the artifact. C. They recreate the artifact in order to study it. D. They try to identify how the artifact has changed over time.
Answers
Answer:
c
Explanation:
c
Postprocessual archaeologists approach an artifact by the fact that they recreate the artifact in order to study it. Thus, the correct option for this question is C.
What is meant by Archaeologists?Archaeologists may be defined as a type of person who significantly studies and modifies some sorts of the buildings, graves, tools, and other objects of people who lived in the past. They work basically on human history and prehistory through the uncovering of sites.
Postprocessual archaeologists determine the complete movement of the archaeological theory that basically emphasizes the theory that deals with the subjectivity of the interpretation that is made by other kinds of archaeological branches.
Therefore, postprocessual archaeologists approach an artifact by the fact that they recreate the artifact in order to study it. Thus, the correct option for this question is C.
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Communication between neurons occurs from contact between the two neurons. when the intensity of the action potential increases past a threshold. when action potentials trigger the release of neurotransmitters. because of the all-or-none response. through the selective permeability of the axon.
Answers
Answer:
The correct answer is - when action potentials trigger the release of neurotransmitters.
Explanation:
Communication between neurons takes place by signaling that can be either chemical signaling or electrical signals. Communication between neurons occurs at very small gaps known as synapses.
These synapses have two specialized cells that help two neurons communicate by one to another to allow for chemical transmission. The chemical that isreleased due to the stimulation of the action potential in order to communicate the neurons are known as neurotransmitters that allow for transmission.
how can evidence from an experiment in relationship to the hypothesis
Answers
Answer:
The Hypothesis is a prediction based on the theory being tested.
The evidmence can support the Hypothesis or invalidate the Hypothesis.
Explanation:
how do i explain assimilation of glucose?
Answers
Explanation:
Is the movement of digested food molecules into the cells of the body where they are used
Example:glucose is used respiration to provide energy
Answer:
Assimilation is that process distribute to cells during absorbs and nutrients or digestion your body is known as assimilation.
Explanation:
Assimilation nutrients gets the food to your cells they used growth and repair,assimilation of nutrients in the small intestine.
Assimilation is that process important cell take nutrient from the pump and intestine into your body and his distributed in your body.
The other side intestine cell another pump that glucose into the blood and surround the intestine, glucose in the blood can its a serious problems, blood flows to the liver deliver into the glucose storage.
Glucose is delivered to all the cell in your body,liver cell can store glucose as glycogen,in your body cell use glucose to make cellular energy in body.
Glucose can contain reach small intestine down into individual sugars,like glucose,take sugar from the intestinal cells.
Assimilation is the process of vitamins, minerals and chemical food,
assimilation is the chemical alteration of substance in the liver or cellular secretions.
Which of the following items was Darwin able to use to study the structures of
extinct organisms?
A. Fossils
O B. Species
O C. Amino acids
O D. Adaptations
Answers
Answer:
a
Explanation:
because that is all he had left of extinct animal's.
Answer:
A
Explanation:ithink not sure
can a steam cell taken from a baby, and giving the cell all that needs, can make clone
Answers
Answer:
i think so
Explanation:
Clones contain identical sets of genetic material in the nucleus—the compartment that contains the chromosomes—of every cell in their bodies. Thus, cells from two clones have the same DNA and the same genes in their nuclei.
Which uses of soil are discussed in the video? Check all that apply. as a habitat for animals to live in as a way to clean and store water as a place for plants and crops to grow as a material to clean and smooth skin as a building material for homes and buildings as an area to build windmills for energy production
Answers
Answer:
3. As a place for plants and crops to grow
4. As a material to clean and smooth skin
5. As a building material for homes and buildin
Answer:
3,4,5
Explanation
Cave-dwelling catfish and cave-dwelling earthworms both lack pigmentation and their eyes are reduced or absent. The most recent common ancestor to these organisms had normal pigmentation and fully developed eyes. The similarities between cave catfish and cave earthworms are an example of
Answers
Answer:
Analogy
Explanation:
Cave catfish and cave earthworms can be said to have analogous traits, which have over the years developed separately and have different ancestral origins. This new analogous trait is as a result of the need for both organisms in their different environments, which seem similar in condition, to adapt well.
Through convergent evolution analogous structures and traits are usually formed or observed in organisms that do not share the same ancestral origin.
Bears eat berries, humans, and large fish; large fish eat smaller fish and insects; humans eat bears, large fish, and berries; Venus flytraps eat insects. The scenario described here is an example of ______.
Answers
Food webs show how food chains are connected and what an ecological group eats. Therefore, this scenario represents a food web.
What is a food web?An ecological community's food web is a graphical representation of the natural connectivity of food chains as well as the question of what consumes what in that community. The term "consumer-resource system" is another name for the "food web."
There are often two distinct kinds of food webs present in an ecosystem: a grazing food web that is supported by photosynthetic plants or algae, and a detrital food web that is supported by organisms that decompose dead matter (such as fungi).
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easy biology question below first correct answer gets brainliest!!
Molecules move from
diffusion.
during
A. high concentration to low concentration
B. an equally distributed concentration to an unequally
distributed concentration
C. one cell's nucleus to another cell's nucleus
Answers
Answer:
A) high concentration to low concentration is it's answer