Which of the following statements is true of the mechanism of action of direct-acting skeletal muscle relaxants?
A. Direct-acting skeletal muscle relaxants directly affect the nicotinic-muscle receptors.
B. Direct-acting skeletal muscle relaxants interact with special receptors in the sarcoplasmic reticulum to block the release of calcium ions.
C. Direct-acting skeletal muscle relaxants facilitate skeletal muscle fiber contraction.
D. Direct-acting skeletal muscle relaxants act within the central nervous system to produce skeletal muscle relaxation.
Answer: B
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