When a person dies, muscles become rigid and fixed in position. This is a condition known as rigor mortis. Why does rigor mortis occur?
A) ATP is not available to release myosin heads from actin filaments.
B) Muscle fibers break down quickly in the absence of oxygen.
C) ATP is not available to cause sarcomeres to shorten.
D) The human skeletal system locks together after death.
Correct Answer:
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