If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?
A)Tropomyosin will not be pulled away from the myosin binding sites.
B)Myosin heads will not bind to the actin filament.
C)The power stroke will not be produced preventing the actin filament from moving.
D)All of these are complications resulting from a lack of calcium.

Question

Quizplus · Accepted Answer

Calcium is essential for muscle contraction as it binds to troponin, causing tropomyosin to move away from the myosin binding sites on actin filaments. Without calcium, myosin cannot bind to actin, preventing the power stroke and muscle contraction.

If Calcium Is Not Present in the Muscle Cell What