MCAT Question A Day - 3/25/14

Rigor mortis, a condition in which skeletal muscles temporarily remain in a rigid state of partial contraction due to the absence of ATP, occurs a few hours after death. Which of the following steps is not necessary for muscle relaxation?

A. Repolarization of the sarcolemma

B. The return of calcium to the sarcoplasmic reticulum

C. The detachment of the troponintropomyosin complex from actin

D. The decomposition of acetylcholine by cholinesterase

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