Answer :
It is true that at a chemical synapse, the action of the neurotransmitter is determined by the ligand-gated receptor on the postsynaptic cell.
Neurotransmitters are the signaling molecule that are released to create a synaptic signal between two neurons. They can also be called ligands in simple terms. The neurotransmitter could ne excitatory or inhibitory. The examples are: glutamate, GABA, acetylcholine, etc.
Ligand-gated receptors are those that function only when a specific ligand binds to them. The ligand they bind to can show its effect only when such receptors are present, otherwise the signaling does not take place. They are also called ionotropic receptors.
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