Question

Question: Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?
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Answer 1

Answer: As the electrical impulse reaches the axon terminal in the region of axon-dendrite synapse, it stimulates the exocytosis of vesicles containing. . neurotransmitter. Neurotransmitter attaches to the chemoreceptor sites of the membrane covering the dendrite end of synapse. It creates a new impulse that travels through cell body and sxon of the second neuron. At synapse, the axon end does not contain any chemoreceptor sites so that reverse flow of electrochemical impulses is not possible.

Answer 2

$\huge\red{Answer}$

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.

So basically, electrical signals get converted into a chemical.

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