A person experiences severe muscle cramping after intense ex…
A person experiences severe muscle cramping after intense exercise. Complete the following statements regarding the roles of calcium and ATP: ATP is essential for the of myosin heads from actin during the cross-bridge cycle. An ATP shortage prevents this, resulting in sustained contraction. Additionally, calcium must be cleared from the cytosol to allow muscle relaxation; without sufficient ATP to power the pumps, calcium remains elevated in the sarcoplasm.