Question

cholinergic receptors that are always excitatory in the presence of ach are called _______ receptors.
multiple choice
○ muscarinic
○ beta
○ catecholamine
○ nicotinic

Explanation:

Cholinergic receptors include nicotinic and muscarinic. Nicotinic receptors are always excitatory when ACh (acetylcholine) is present. Muscarinic receptors can be excitatory or inhibitory. Beta receptors are adrenergic (respond to norepinephrine/epinephrine), and catecholamine is a type of neurotransmitter (like dopamine, norepinephrine), not a receptor type. So the correct receptor that is always excitatory with ACh is nicotinic.

Answer:

D. nicotinic