Question

receptors of the parasympathetic nervous system
what type of receptor is located in the membranes of all parasympathetic target cells?
muscarinic receptor
alpha receptor
beta receptor
nicotinic receptor

Explanation:

Parasympathetic nervous system uses acetylcholine as neurotransmitter. Muscarinic receptors are specific for acetylcholine in parasympathetic target cells. Alpha and beta receptors are for sympathetic nervous system (norepinephrine/epinephrine). Nicotinic receptors are at neuromuscular junctions (somatic nervous system) and autonomic ganglia (both sympathetic and parasympathetic ganglia, but not on target cells of parasympathetic).

Answer:

Muscarinic receptor