Question

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Describe the ion movement across the cell membrane during the following stages: resting potential, threshold potential, depolarization, repolarization.

Answer 1

RESTING POTENTIAL the electrical potential of a neuron or other excitable cell relative to its surroundings when not stimulated or involved in passage of an impulse.

Answer 2

The threshold potential is the critical level to which the membrane potential must be depolarized in order to initiate an action potential.

Answer 3

DEPOLARIZATION is the loss of polarization; especially : loss of the difference in charge between the inside and outside of the plasma membrane of a muscle or nerve cell due to a change in permeability and migration of sodium ions to the interior.

Answer 4

In neuroscience, repolarization refers to the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential has changed the membrane potential to a positive value.

Answer 5

we can simplify it by saying
we have two surfaces of nerve cell the outer and inner surface
resting : when the outer layer ion charge more positively than the inner layer
deplarization : we have the counter part of this state
repolarization : retun to the polarization
hyperpolarization : the inner negative ion charges will be more negtive even more than the resting potential

Answer 6

Does that help?

Answer 7

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