Nicotinic receptors are ionotropic receptors found on muscle cells at the neuromuscular junction. They are not metabotropic (B), d-tubocurarine is a blocker, not a stimulator (C), and they typically have five subunits, not just one $\alpha$ and one $\beta$ (D).

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Nicotinic Receptors
A) Are Found on Muscle Cells at the Neuromuscular

Question 13

Multiple Choice

Nicotinic receptors

A) are found on muscle cells at the neuromuscular junction.
B) are metabotropic receptors.
C) can be overly stimulated by the poison d-tubocurarine.
D) possess two protein subunits, one $\alpha$ unit and one $\beta$ unit.