Question
The flow of impulse in a nerve is unidirectional. Give reason.

Answer

  1. The neurotransmitters involved in the conduction of nerve impulse across the synapse, are present only in the axon terminals and not in the dendrites or cell body.
  2. In a synapse, the impulse travels from the axon terminal to the dendrite or cell body of the next neuron; hence, the flow of nerve impulse is unidirectional.

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