Now let's switch gears and talk a little bit about the neurotransmitters
and the receptors associated with the autonomic nervous system.
Based on the neurotransmitter that they produce and release or accept,
autonomic neurons and receptors are considered either cholinergic or adrenergic.
Cholinergic neurons are going to be neurons
that release the neurotransmitter acetylcholine from their axon terminals.
Adrenergic neurons however are going to release norepinephrine.
On the receptor side, we also have cholinergic and adrenergic receptors.
These are found on the postganglionic neuron as well as on the effector.
Cholinergic receptors include nicotinic receptors
which are bound by nicotine and muscarinic receptors which are bound by muscarine.
Both of these cholinergic receptors are also able to be bound by acetylcholine
which is a very important neurotransmitter for nerve impulses.
All preganglionic neurons release acetylcholine.
So that means all postganglionic neurons must have cholinergic receptors.
Adrenergic receptors are going to be receptors that accept norepinephrine.
This can be found on several blood vessels as well as other organs in the body.