Which muscle type(s) use(s) calcium to trigger actin-myosin interactions for movement?
A) Smooth muscle only
B) Cardiac muscle only
C) Skeletal muscle only
D) Both smooth and cardiac muscle, but not skeletal muscle
E) Smooth, cardiac, and skeletal muscle

Question

Quizplus · Accepted Answer

All three types of muscles - smooth, cardiac, and skeletal - use calcium to trigger actin-myosin interactions for movement. This process involves the release of calcium ions from the sarcoplasmic reticulum in response to an action potential, which then binds to troponin and initiates the sliding of actin and myosin filaments past each other.

Which Muscle Type(s) Use(s) Calcium to Trigger Actin-Myosin Interactions for Movement