Question

Rigor mortis in due to

• A. Depletion of ATP
• B. Excess ATP
• C. Excess availability of calcium
• D. Release of magnesium

Answer 1

The correct option is A Depletion of ATP

• Regor mortis is one of the recognizable signs of death, caused by the depletion of ATP followed by the chemical changes in muscles after death, causing the body to stiffen and locked in place, making it difficult to move and manipulate.
  
• When the ATP is depleted muscles can not contract and the body becomes stiff.
• It takes about 2 days for rigor mortis to fade, and once it does, decay sets in.
  
• Hence rigor mortis is due to depletion of ATP.
  
• So, the correct answer is 'Depletion of ATP'.