What happens when ATP binds to myosin heads during muscle contraction?
ACalcium ions are released from the sarcoplasmic reticulum.
BCalcium ions are taken up by the sarcoplasmic reticulum.
CCross-bridges between myosin heads and actin filaments are broken.
DMyosin heads form cross-bridges with actin filaments.
ACalcium ions are released from the sarcoplasmic reticulum.
BCalcium ions are taken up by the sarcoplasmic reticulum.
CCross-bridges between myosin heads and actin filaments are broken.
DMyosin heads form cross-bridges with actin filaments.