Calcium Ions Bind to the ___ Molecule in Skeletal Muscle

Question

Calcium ions bind to the ___ molecule in skeletal muscle cells.
A) actin
B) troponin
C) tropomyosin
D) myosin
E) titin

Accepted Answer

Calcium ions bind to the troponin molecule in skeletal muscle cells, which causes a conformational change that moves tropomyosin away from the actin binding sites, allowing muscle contraction to occur.