Final answer:
Muscarinic and nicotinic receptors are receptors for the neurotransmitter acetylcholine.
Step-by-step explanation:
Muscarinic and nicotinic receptors are receptors for the neurotransmitter acetylcholine. Muscarinic receptors are G-protein coupled receptors found in the autonomic nervous system, while nicotinic receptors are ligand-gated ion channels found in the central nervous system and neuromuscular junctions.
Learn more about Neurotransmitters