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Question:
A 72 year old man has a cardiac arrest and despite resuscitation efforts, dies 10 minutes later. When he is examined at the morgue, his muscles are frozen in a contracted state. The underlying physiologic reason for this is:
Correct Answer: A. Because there is no source of ATP, the myosin head cannot detach from actin and they remain bound together
This is the condition of “rigor mortis.” When no ATP is present, the myosin head cannot detach from the actin filament and the muscle is locked in place.
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1. Question
Category: PhysiologyA 72 year old man has a cardiac arrest and despite resuscitation efforts, dies 10 minutes later. When he is examined at the morgue, his muscles are frozen in a contracted state. The underlying physiologic reason for this is:
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