Final answer:
Post-ganglionic sympathetic neurons utilize norepinephrine as a neurotransmitter, which binds to α1, α2, and β1 receptors. This is in contrast to postganglionic parasympathetic fibers, which release acetylcholine and bind to muscarinic receptors on target cells.
Step-by-step explanation:
Post-ganglionic sympathetic neurons may utilize norepinephrine as a neurotransmitter, which binds to α1, α2, and β1 receptors. Norepinephrine is released by postganglionic sympathetic fibers and binds to adrenergic receptors on target cells. This is in contrast to postganglionic parasympathetic fibers, which release acetylcholine and bind to muscarinic receptors on target cells.