Binding of a neurotransmitter to its receptors opens chemically gated channels on the postsynaptic membrane.
Neurotransmitters act like a key and the receptor site acts like a lock. It takes the right key to open specific locks. If the neurotransmitter is able to function at the receptor site, it will cause changes in the receptor cell.
A neurotransmitter can be defined as a chemical messenger that is released by neurons. This molecule ensures that the information is carried to a receiving cell.
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