Question

What happens when a neurotransmitter binds to a receptor on the postsynaptic cell?

Answer 1

After release into the synaptic cleft, neurotransmitters interact with receptor proteins on the membrane of the postsynaptic cell, causing ionic channels on the membrane to either open or close. When these channels open, depolarization occurs, resulting in the initiation of another action potential

Answer 2

The postsynaptic cell becomes either more or less likely to fire an action potential.

If the postsynaptic cell is excited enough, it will continue passing the message to other cells.