Suppose the rectus femoris,one of the quadriceps muscles in your anterior thigh,has been deprived of ATP.Rectus femoris will
A)immediately relax.
B)release all actin-myosin bonds.
C)enter a state where actin and myosin are unable to separate.
D)fire many more action potentials than usual and enter a state of "rigor."
E)sequester all free calcium ions into the sarcoplasmic reticulum.

Question

Quizplus · Accepted Answer

When the rectus femoris muscle is deprived of ATP, it will enter a state where actin and myosin are unable to separate. This is because ATP is required for myosin to release from actin during muscle contraction. Without ATP, the myosin heads remain bound to actin, which results in a sustained contraction or "rigor." This state only ends once ATP levels are replenished, allowing the myosin heads to release from actin and the muscle to relax.

Suppose the Rectus Femoris,one of the Quadriceps Muscles in Your