What Do the Calcium Ions Released into the Cytosol During

Question

What do the calcium ions released into the cytosol during excitation of skeletal muscle bind to?
A) actin
B) troponin complex
C) myosin
D) transverse tubules

Accepted Answer

The calcium ions released during excitation of skeletal muscle bind to the troponin complex, causing a conformational change that allows myosin to bind to actin and initiate muscle contraction.