Skeletal muscle

This movement involves the contraction of muscles, another process that uses ions, calcium. Calcium ions bind to tropnin, which causes tropomyosin to move away from the myosin head binding site on actin filaments. Actomyosin cross-bridge is formed, actin filament slides into myosin, calcium ions activate ATPase to hydrolyse ATP to ADP and phosphate ions, a process that releases energy for the detachment and reformation of cross bridges. Contraction of the muscle sarcomere allows the contraction of skeletal muscle, allowing the animal to move. Muscles contractions are also used by animals in processes such as controlling light entry into the eye blood flow in arterioles in maintenance of homeostasis. All these processes require nervous coordination and contraction, emphasising the importance of the inorganic ions for proper function