Muscle contraction begins when calcium levels ______ and ends when they ______.
A) decrease; decrease
B) decrease; increase
C) increase; decrease
D) increase; increase

Question

Quizplus · Accepted Answer

Muscle contraction begins when calcium levels increase, which allows for the actin and myosin filaments to interact and create a contraction. The contraction will continue as long as there is enough calcium present. Once calcium levels decrease, the contraction will come to an end.

Muscle Contraction Begins When Calcium Levels ______ and Ends When