Once again, imagine yourself as a motor neuron. The neuropil serves as your imme

Question

Once again, imagine yourself as a motor neuron. The neuropil serves as your immediate environment. Axons from other neurons constitute a portion of these compacted cellular processes. You have learned thataxons transmit action potentials at dynamic frequencies and that each action potential is a cycle of membrane de- and repolarization. If repolarization is enabled by potassium efflux, then would your resting membrane potential be put at risk if nearby axons were transmitting information at sustained high frequency?

yes

no

Explanation / Answer

No.

Neuronal transmission follow all-or-none response, and the conduction is always uidirectional. After generation of action potential, each neuron pass through three sages namely, depolarization, repolarization and resting phase. After it attains resting phase, then only the cell is ready to recieve another impulse. This is because the sodium channels are in closed state during membrane repolarization, unless the sodium channels are in open state, cell cannot recieve another impulse, whatever be its intensity because depolarization do not occur.

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