Which of the following statements about skeletal muscle cont

Which of the following statements about skeletal muscle contraction is false?

A. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system causes Ca2+ to flow into the sarcoplasmic reticulum, triggering a muscle contraction.

B. A change in the conformation of troponin leads to changes in tropomyosin such that it no longer blocks the binding of myosin heads to the actin filament.

C. During muscle contraction, the Z discs move closer together as the myosin heads walk toward the plus ends of the actin filaments.

D. An action potential in the muscle cell plasma membrane leads to voltage-gated calcium channels opening in the T-tubule membrane.

Solution

B. A change in the conformation of troponin leads to changes in tropomyosin such that it no longer blocks the binding of myosin heads to the actin filament. This statement is wrong

The correct process is

Binding of Ca ion to Troponin C, uncovering myosin binding sites on actin