Answer :
Calcium ion is responsible for triggering the release of nts during synaptic transmission.
The transmission of impulse depends on two factors namely depolarization of terminal and release of calcium ions. The electric impulse travels through the nerve and reaches pre-synaptic nob. Now, the electrical signal is converted into chemical signal, as it involves release of calcium ions.
Once transmitted, the impulse travels in next neuron again as electrical impulse. Synapse is important in impulse transmission as it provides speed and accuracy. It is found in connection between sensory organs and peripheral nervous system, allowing us to react on pain or touching hot object.
Neurotransmitters are the chemical messengers which connect different neurons by transmitting the information. Examples of neurotransmitters are acetylcholine, Gamma aminobutyric acid abbreviated as GABA etc.
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