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Which of the following statements is TRUE regarding the nerve impulse/action potential?
When a neuron is at rest, it can fire, but only weakly. It fires pore strongly when it is at action potential.
The neuron is depolarized when it is at its resting potential. This means that ions are mixed (negative and
positive charges inside and outside of the neuron's membrane).
The neuron is polarized when it is at its resting potential. This means that ions are separated by charge
(positives outside the membrane; negatives inside the neuron).
O When a neuron reaches complete polarization, it fires.

Sagot :

luisvaschetto

The resting potential refers to the imbalance of the electrical charges between the interior of one cell (neuron) and its surrounding environment. A neuron is at its resting potential when it is inactive and polarized.

  • The statement "the neuron is polarized when it is at its resting potential. This means that ions are separated by charge" is TRUE.

  • In consequence, at the rating potential, ions are separated by charge, i.e., positive (+) ions outside the cell membrane and negative (-) ions inside of the neuron.

  • When a stimulus reaches a neuron at the resting potential, the voltage-gated sodium (Na+) channels on the neuron's membrane open.

  • Subsequently, Na+ ions enter into the cell, thereby the neuron becomes more positive (depolarization).

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