NEET PG DENTAL EXAM

Detailed explanation-1: -For example, when acetylcholine is released at the synapse between a nerve and muscle (called the neuromuscular junction) by a presynaptic neuron, it causes postsynaptic Na+ channels to open. Na+ enters the postsynaptic cell and causes the postsynaptic membrane to depolarize.

Detailed explanation-2: -Calcium plays a major role in triggering synaptic vesicle exocytosis and the release of neurotransmitters. When an action potential propagates down the axon of a nerve and arrives at the axon nerve terminal it activates voltage-gated calcium channels causing an increase in intracellular calcium at the active zone.

Detailed explanation-3: -Neurotransmitters are released from synaptic vesicles in presynaptic neurons in response to neural activity, diffuse across the synaptic cleft, and bind specific receptors in order to bring about changes in postsynaptic neurons.