Question

at synapse mechanical impulse change into chemical impulse, why?

Answer 1

The dendrite end of the neuron collects information and triggers a chemical reaction, which results in an electric impulse. ... Thus, electrical impulse in the neuron change into chemical impulse in the synapse by chemical called neurotransmitter.synape is minute gap between two neurons when impulses reaches at the axon of neuron it has to pass through this gap.

that is the reason why mechanical impulse change into chemical impulse

Answer 2

at synapse mechanical impulse change into chemical impulse because the mechanical impulse needed medium to travel but synapse is gap between dendrite and terminal aborisation