What brings about completion of rigor mortis?

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Multiple Choice

What brings about completion of rigor mortis?

Explanation:
Rigor mortis completes because there is no ATP left to break the grip of the myosin heads on actin. After death, ATP production stops, and the muscle’s high-energy phosphate stores begin to dwindle. Creatine phosphate normally buffers this crisis by quickly replenishing ATP from ADP, helping keep muscles relaxed in the early postmortem period. When creatine phosphate is exhausted and ATP can no longer be regenerated, the cross-bridges stay locked, and rigor becomes fully established. Later on, rigor diminishes again as proteolytic enzymes break down muscle proteins, allowing relaxation to return.

Rigor mortis completes because there is no ATP left to break the grip of the myosin heads on actin. After death, ATP production stops, and the muscle’s high-energy phosphate stores begin to dwindle. Creatine phosphate normally buffers this crisis by quickly replenishing ATP from ADP, helping keep muscles relaxed in the early postmortem period. When creatine phosphate is exhausted and ATP can no longer be regenerated, the cross-bridges stay locked, and rigor becomes fully established. Later on, rigor diminishes again as proteolytic enzymes break down muscle proteins, allowing relaxation to return.

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