Chemical messengers, also known as neurotransmitters, are molecules that transmit signals from one neuron to another across the synapse.
Proteins on the receiving neuron that detect and bind to specific neurotransmitters.
Excitatory Neurotransmitters: Neurotransmitters that increase the likelihood of an action potential in the receiving neuron.
Inhibitory Neurotransmitters: Neurotransmitters that decrease the likelihood of an action potential in the receiving neuron.