Business, 13.12.2021 19:20 ani61

Rigor mortis is a muscle stiffening that sets in a few hours after death. It is due to muscles being in a contracted state. It dissipates after several days as muscle proteins degenerate and cells break down. Rigor mortis is one sign that coroners take into account when estimating a time of death. At a cellular level, what is the mechanism behind rigor mortis? A. After death, membranes become leaky, and sodium flowing into motor neurons triggers action potentials that contract muscles.
B. After death, ATP production ceases and ATP is needed for myosin release from actin
C. After death, calcium ions are no longer available to bind troponin
D. In the absence of ATP, kinesin and dynein no longer move along microtubules and remain locked in place.

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Rigor mortis is a muscle stiffening that sets in a few hours after death. It is due to muscles being...

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