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Question

Question 53
Why is the flow of signals in a synapse from the axonal end of one neuron to dendritic end of another neuron but not the reverse?


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Solution

The flow of signals through neurons takes place in the form of specialized chemicals called neurotransmitters. The neurotransmitters can only enter a neuron through dedicated receptor channels. Such receptor channels are only present at the dendritic end but not at the axonal end. Hence the flow of signals in a synapse happens from the axonal end of one neuron to the dendritic end of another neuron but not in the reverse direction.


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