Question

multiple select question select all that apply which of the following roles does atp have in muscle contraction and relaxation? (select all that apply) break the link between actin and myosin energize myosin shift tropomyosin away from binding sites on actin active transport of ca++ back into the sarcoplasmic reticulum attach ca++ to troponin

Explanation:

ATP binds to myosin, breaking the cross - bridge between actin and myosin. It also provides energy to energize myosin for muscle contraction. During muscle relaxation, ATP is used for the active transport of $Ca^{++}$ back into the sarcoplasmic reticulum. Troponin binding to $Ca^{++}$ and shifting tropomyosin away from binding sites on actin are not directly ATP - dependent processes.

Answer:

• break the link between actin and myosin
• energize myosin
• active transport of $Ca^{++}$ back into the sarcoplasmic reticulum