Which of the following statements about nicotinic and muscarinic receptors is true?
A. Nicotinic receptors are ionotropic, whereas muscarinic receptors are metabotropic.
B. Nicotinic receptors are metabotropic, whereas muscarinic receptors are ionotropic.
C. Nicotinic and muscarinic receptors are both ionotropic.
D. Nicotinic and muscarinic receptors are both metabotropic.
Answer: A
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