Question

Why is the flow of signals in a synapse from axon end of one neuron to?

Answer 1

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➡Signals in a synapse flow from axonal end of one neuron to dendritic end of another neuron but not the reverse because when this electrical signal after reaching the axonal end releases a chemical. This chemical then moves towards the dendrite end of the other neuron.

Answer 2

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Explanation:

The synapse actually acts, like a one-way valve because the chemical substance is present only on one side of the gap.

This chemical diffuses towards the dendrite end of next neuron where it generates an electrical signal. Since, the chemicals are absent at the dendritic end of neuron, the nerve impulse can go across only from one side (which contains the chemical substance).

In this way, it is ensured that nerve impulses travel in only one direction (through particular set of neurons).