Which of the following characterize the role of calcium in muscle contraction? Check all that apply.

The release of Ca2+ from the sarcoplasmic reticulum is stimulated by a nerve impulse. The release of Ca2+ from the sarcoplasmic reticulum is stimulated by a nerve impulse.

A high concentration of Ca2+ prevents cross-bridges from occurring. A high concentration of Ca2+ prevents cross-bridges from occurring.

Ca2+ ultimately allows contractions to occur by facilitating the binding of actin and myosin. Ca2+ ultimately allows contractions to occur by facilitating the binding of actin and myosin.

T tubules act as channels for Ca2+ to move into the sacroplasmic reticulum.