Upon reaching the threshold for an action potential, the next step in its generation is the opening of _sodium (Na)_ channels. The correct answer is sodium,
How does membrane depolarization occur?The occurrence of action potential requires the existence of active voltage-dependent channels to open and close in response to the membrane depolarization.
When depolarization reaches and supers the threshold point, voltage-dependent Na+ channels open and the ion gets into the cell.
The entrance of Na+ decreases the electric charge difference between the cellular interior and exterior. Membrane depolarizes and produces the action potential that tends to reach a potential equilibrium for Na+ = +60mV.
The higher the Na+ input is, the greater is the depolarization and the greater is the Na+ permeability.
Once Na+ channels are closed, voltage-dependent K+ channels open, increasing the membrane permeability to the ion, letting K+ get out of the cell, following the electrochemical gradient.
The closure of Na+ channels and opening of K+ channels are responsible for membrane repolarization.
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Plsss helpppp!!!
Which are four requirements for natural selection to occur ?
Select all the apply
How do i complete the punnet square
Which is the largest migratory wild reindeer herd in the world?.
Answer:
The Western Arctic caribou herd
Explanation:
PLEASE HELP!!!! WILL MARK BRAINLIEST!!!!
Answer:
yes, these are isotopes of nitrogen.
Explanation:
Any atom with the same number of protons, but a different number of neutrons is called an isotope. Nitrogen has 7 protons and 7 neutrons. If it had a different number of protons, it would be a different element. Since we know both elements A and B are Nitrogen and therefore both have 7 protons, that means they have 8 and 9 neutrons, respectively. Therefore, they are isotopes of Nitrogen.
identify the items shown in this model that are relevant to climate change?
Answer:
Deforestation factories and power plants oil and petrol engines radiation being reflected back to earth
What is the most important factor in determining the type of volcanic eruption?
a.
The location of the volcano
b.
The type of magma
c.
The temperature of lava
d.
The shape of the volcano
Which characteristics is common to all three groups of reptiles?
They use claws for defense.
They protect their eggs.
They have moveable eyelids.
They are ectotherms.
How are earthworms and fish similar?
Answer:
The answer is D
hope this helps!
Suppose a species lives in an ecosystem with unlimited resources and no predators. What is the shape of its population versus time graph? help ASAP
Answer:
D. a curve that increases exponentially as time passes
Explanation:
I just took the test
A population growth curve that increases exponentially as time passes would result if a species has unlimited resources and no predators.
Exponential population growthExponential population growth occurs when a population is capable of reaching its biotic potential.
With unlimited resources and a lack of predators, the population of a species continues to grow exponentially without any hindrance. This result is a J curve.
With limited resources, the population might increase exponentially initially and will level off as the carrying capacity of the ecosystem is reached.
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Which of the following is an example of a nonspecific immune response?
I. white blood cells that invade the area of a cut in the skin
II. an injury triggers mast cells to release histamine, causing inflammation
III. killer T-cells destroy pathogens by recognizing proteins on cell surfaces
A.I and II only
B. I, II, and III
C. ll only
D. l only
An example of a non-specific immune response is: A. I and II only.
What is a non-specific immune response?A non-specific immune response can be defined as a generalized response from a living organism to pathogen infections that typically involves the use of various white blood cells, as well as plasma proteins.
The examples of non-specific immune response.In Biology, some examples of non-specific immune response including the following:
White blood cells invading the area of a cut (injury) in the skin.An injury that triggers many cells to release histamine, thereby, causing inflammation.A macrophage that engulfs invading pathogen such as bacteria.Read more on pathogens here: https://brainly.com/question/1008643
Instead of teeth, what do some whales use to eat plankton?.
Answer:
they graze through the water slowly with mouth opened
Explain into 3-4 sentences how each type of rock forms into another type of rock. Make sure to include the processes that go for each rock transformation.
Why do people kill the female babies in the womb itself what have they done wrong?
What are egg laying animals called
Answer:
Oviparous animals is ur ans
Explanation:
Stay safe, stay healthy and blessed.
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In a transformation experiment, a sample of E. coli bacteria was mixed with a plasmid containing the gene for resistance to the antibiotic ampicillin (ampr). Plasmid was not added to a second sample. Samples were plated on nutrient agar plates, some of which were supplemented with the antibiotic ampicillin. The results of E. coli growth are summarized below. The shaded area represents extensive growth of bacteria; dots represent individual colonies of bacteria.
1. Wildtype + No Amp: Lawn
2. Wildtype + Amp: No growth
3. Plasmid + No Amp: Lawn
Which of the following best explains why there is no growth on plate II?
A. The initial E. coli culture was not ampicillin-resistant.
B. The transformation procedure killed the bacteria.
C. Nutrient agar inhibits E. coli growth.
D. The bacteria on the plate were transformed.
According to the video, what is the goal of the tree of life?
a. To summarize the fossil record
b. To describe how natural selection works
To be a library of all life that has ever lived
d. To explain how all species are related to each other
Brackish water is common in freshwater wetlands. Please select the best answer from the choices provided T F.
Answer:false
Explanation:
brackish water occurs when fresh water goes into the ocean and mixes.
Brackish water is common in freshwater wetlands. The statement is false
What is brackish water ?
Brackish water with salinity levels between seawater and freshwater, when surface or groundwater mixes with seawater brackish water formed in deep fossil aquifers.
Brackish water is undervalued can be used for irrigation and most industries can’t use it and not fit for consumption by humans or livestock. Brackish water is easier to desalinate than seawater.
The global warming and climate change show an impact on the composition and increased occurrence of brackish water. Due to global salt levels increases, the level of brackish water, increases.
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Which of these animals is most likely to be infected with rabies in the United States
Cow - Horse - Hamster - Bat
What does this graph demonstrate?
A. The latent studies
B. The web-based curriculum
C. The tracking system
D. The achievement gap
Answer:
D. The achievement gap
Explanation:
Just took it
Answer:the achievement gap
Explanation:
trust me
How many phosphates would amp have attached to it?.
Answer:
A nucleotide is a nucleoside attached to 1, 2, or 3 phosphate groups. In the figure, when adenosine is attached to one phosphate, the structure can be referred to as AMP, adenosine monophosphate, and a nucleotide. When adenosine is attached to two phosphates, the structure can be referred to as ADP, adenosine diphosphate, and a nucleotide.
Explanation:
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Which section of ocean floor is near the coastlines of all continents?
A. neritic zone
B. open ocean
C. shallow ocean
D. intertidal zone
NO, it is NOT D. intertidal zone like all the other Brainly answers to the question says.
THE CORRECT ANSWER IS C. SHALLOW OCEAN on edg 2022
Answer:
c
Explanation:
Answer:
c. shallow ocean
Explanation:
correct on edg 2022
An exocrine gland with a branched duct is said to be:.
An exocrine gland with a branched duct is said to be a compound exocrine glands.
Exocrine glands of the body systemExocrine glands are those glands or organs that secrete substances which are transported to its target site through a duct or open pores.
There are different types of exocrine glands which include:
Simple exocrine glands: They are comprised of branches that are not branched andCompound glands: They are comprised of branched ducts. Examples of compound exocrine glands are the salivary duct and pancreas.Therefore the exocrine gland with a branched duct is said to be a compound exocrine glands.
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ITs a picture.. anyway please help!
Answer:
Explanation:
So basically the boy is holding up a stinky sock and the boy smelt it so the other boy is laughing that's what I think
Name two major types of mutations. What do they have in common? How are theydifferent? Give an example of each.
Answer:
Two major categories of mutations are germline mutations and somatic mutations.Germline mutations occur in gametes. These mutations are especially significant because they can be transmitted to offspring and every cell in the offspring will have the mutation.
Somatic mutations occur in other cells of the body.
what is pressure and how do we get it
Answer:
pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid. ... In SI units, pressure is measured in pascals; one pascal equals one newton per square metre. Atmospheric pressure is close to 100,000 pascals.
Calculating pressure
To calculate pressure, you need to know two things:
Pressure is calculated using this equation:
pressure = force ÷ area.
Match the type of boundary with its characteristic.
Answer:
i hope it will help you have a great day bye and Mark brainlist if the answer is correct bye....
Which of the following can you infer from the information in the table below? Hominid species Evidence H. Neandertalensis Physical features include skeleton suited for upright walking, hands, and large brains. Burial sites contain artifacts like flowers, food, and weapons. All fossils found have been radiocarbon dated to be 130,000 to 35,000 years old. H. Sapiens Walk upright, have thumbs used for making tools. Large brains Bury their dead ceremonially. Fossils found in sediment layers containing volcanic ash crystals that are 195,000 years old H. Neandertalensis and H. Sapien were able to mate and produce offspring. H. Neandertalensis is not a direct ancestor of H. Sapien. H. Sapien is a hominid branch that will become an evolutionary dead end. H. Sapien and H. Neandertalensis did not occupy the same geographic region.
We can infer from the information in the table below information about the evolution.
Evolutionary History of Modern Man1) Modern shares a common ancestor with gorillas and chimpanzees.
2) Some species before sapiens sapiens, according to the evolutionary process, are:
AustralopithecinesErgasterRectusNeanderthalensis and sapiens.3) Australopithecines inhabited the arboreal savannas of Africa around 2.8 to 2.3 million years ago.
4)Several species of australopithecines were able to walk upright or semi and had small brains.
5) During this period, Africa was undergoing a series of environmental changes that transformed its arboreal savannas, inhabited by australopithecines, into open savannas.
6) Thus, the australopithecines began to be exposed to predators, due to the decrease in shelters. This fact led to the extinction of most australopithecines.
Only a few lineages were able to adapt and survive, allowing the emergence of hominids.
With this information, we can know a little more about the evolution process of the human species.
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Answer:
im probably late but the correct answer is h.neandertalensis is not a direct ancestor of h.sapien
Explanation:
What would happen to a mammalian heart if the nerves leading to it were severed?.
Answer:
The heart muscle would continue to contract but its contraction rate may change. Only the atria would be able to contract. Systolic contraction would still occur, but diastolic relaxation could not occur.
Which is these is not a carbohydrate? *
*
Cellulose
O Glucose
Triglycerides
O Starch
Answer:
Triglycerides
Explanation: Triglycerides are lipids
20 points
a student carried out an experiment to determine how different concentrations of sucrose solution will affect osmosis. the student set up dialysis tubing bags of different sucrose concentrations. then the student massed the bags, placed them in beakers of distilled water for thirty minutes, and then removed the bags. the masses were taken again and the percent change for each bag was calculated. the results were graphed and are shown here. which statements best summarize the experimental data. choose all that apply.
a. low sucrose concentrations caused more water to move out of the bags
b. high sucrose concentrations cause more water to move out of the bags
c. low sucrose concentrations caused more distilled water to move into the bags.
d. high sucrose concentrations caused more distilled water to move into the bags.
e. there is a correlation between sunrise concentration in the bag and the rate of osmosis in the bag.
The inference is that high sucrose concentrations caused more distilled water to move into the experimental bags.
What is osmosis?It is the movement of water molecules from the region of high water potential (low solute concentration) to the region of low water potential (high solute concentration) through a selectively permeable membrane.
Thus, the higher the concentration of sucrose in the bag, the lower the water potential, and the more water molecules move into the bag.
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Answer:
D and E
Explanation:
Taking it rn, Hate test prep
Choose how a cell recognizes only the signals meant for it.
Cells may have receptor proteins that respond to light and sound
O
Cells may have receptor proteins in the cytoplasm that respond to touch.
Cells may have receptor proteins of specific shapes that certain molecules fit in
Cells may have receptor proteins that repel certain sig
Answer:
Cells have different receptors that are specific for different molecules. Receptors can also respond directly to light or pressure, which makes cells sensitive to events in the atmosphere.
Explanation: