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How impulses are transmitted through synapse |
| Answer» There are two types of synapses - electrical synapses and chemical synapses.Conduction and transmission of nerve impulse across a synapse : The theory of chemical transmission or synaptic transmission states that a chemical substance, acetylcholine, is liberated at the synapse and it diffuses through the synaptic transmission occurs in the following way :(a) Release of a neurotransmitter substance at the tip of axon from the synaptic vesicles through presynaptic membrane.(b) Diffusion of this chemical substance, acetylcholine cross the synaptic cleft.(c) Combination of acetylcholine with a chemireceptor on the post synaptic membrane.(d) Depolarization of the post synaptic membrane by neuro-transmitter substance initiate a fresh impulse or action potential passing through the neurons.(e) Inactivation of acetylcholine by an enzyme acetylcholine esterase in the post synaptic membrane.\xa0 | |