Question

Explain the ionic basis of excitation and conduction of signal through nerve fiber.

Answer 1

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✔✔ The excitation of sensory and nerve cells involves the opening/closing of certain ion channels in reaction to stimulation, resulting in a large, momentary change in the cell membrane potential.

✔✔ When the membrane potential rises to the equilibrium potential of Na+ ions, which is +40–+50 mV, the flow of Na+ ions stops.

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