Answer :
Neurotransmitters are endogenous—produced inside the neuron itself. When a cell is activated, these neurochemicals are released into the synapse from specialized pouches clustered near the cell membrane called synaptic vesicles. Hence, the answer is a) presynaptic membrane.
A neuron produces a chemical signaling substance called a neurotransmitter, which can affect another cell across a synaptic gap. Any important gland, target cell, muscle cell, or organ that receives the signal may also be a neuron.
In the synaptic cleft, neurotransmitters are released from synaptic vesicles and can interact with receptors on the target cell. The receptor to which the neurotransmitter binds determines its effect on the target cell. Numerous neurotransmitters are produced from straightforward, abundant precursors like amino acids, which are routinely converted in a restricted number of biosynthetic steps.
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