The Binding of Calcium to the Troponin Complex

Multiple Choice

The binding of calcium to the troponin complex

A) activates myosin kinase, causing phosphorylation of myosin heads.
B) disrupts cross-bridges, allowing filaments to slide past each other.
C) allows tropomyosin to bind actin.
D) opens ion channels, allowing sodium to rush into the muscle cells.
E) causes tropomyosin to shift position, exposing myosin bind sites on actin.