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melisa1 [442]
4 years ago
9

A neuron either fires or it doesn't, and once an action potential has been initiated the impulse travels the entire length of th

e axon without further need of stimulation. This describes the:
Biology
1 answer:
Katen [24]4 years ago
6 0
Signals are transmitted from neuron to neuron via an action potential, when the axon membrane rapidly depolarizes and repolarizes.
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The population of predators and prey tend to stabilize over time. What will most likely happen if the population of a prey speci
Serggg [28]

Answer:

The population of predators will decrease as well because without their prey they won't have anything to feast on for nutrition. So they will decrease without prey.

5 0
4 years ago
1. Why is the ability to perform lactic acid fermentation important to an animal cell when oxygen is scarce?
erastovalidia [21]

Answer:

Fermentation is important can keep obtaining energy from glycolysis.

Explanation:

In the presence of oxygen, cells will use aerobic respiration to obtain energy in the form of ATP. In these conditions, it can produce up to 36 ATP molecules.

This process has three steps: glycolysis, citric acid cycle and electron transport chain.

During glycolysis, a glucose molecule is broken down into two pyruvate molecules, releasing electrons that are taken up by NAD+ which is converted into NADH, and producing a net total of 2 ATP molecules. The NADH produced during glycolysis and the citric acid cycle will go to the mitochondria and give away the electrons to start the electron transport chain that has Oxygen as the last electrons acceptor, and the NAD+ used to continue glycolysis is regenerated in the process.

In anaerobic conditions (no oxygen), the last electron acceptor is scarce, so the NADH can't give away its electrons and the NAD+ cannot be regenerated, so glycolysis stops, eventually causing cell death due to lack of ATP. To avoid this, cells perform lactic acid fermentation, where the NADH gives the electrons to pyruvate which is then converted into lactic acid. This regenerates the NAD+ necessary to continue glycolysis and keep obtaining some energy to survive until oxygen levels increase.

3 0
3 years ago
You fill a shallow pan with water and place a drop of red ink in one end of the pan and a drop of green ink in the other end. Wh
Alex73 [517]
<h2>Answer is (B)</h2>

Explanation:

  • When we fill a shallow pan with water and place a drop of red ink in one end of the pan and a drop of green ink in the other end we see that the red nd green inks are uniformly distributed throughout the pan.
  • This is due to the Diffusion of red ink and green ink in the water. Diffusion is the process where the movement of particles takes place from the region of higher concentrations to the region of lower concentartions.
  • Until the concentration of substances is uniform throughout, this phenomena continues.

3 0
3 years ago
Identify structures C and D
vekshin1

Answer:

C =m rna and d= dna thread

7 0
3 years ago
About how much of the cell mass is watet
Elena-2011 [213]
I think it’s 2/3 please mark brainliest
7 0
4 years ago
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