Actin has a binding site for ATP or ADP.

Activated calmodulin stimulate myosin light chain kinase.

G actin is present in muscle tissue either as a free monomer called G-actin or in polymerised form – F actin.

Myosin light chain dephosphorylation promotes smooth muscle relaxation.

Creatine is formed by conversion of creatinine in liver tissue.

Thin filaments are a polymer of actin with tightly bound regulatory proteins troponin and tropomyosin.

Red fibres are specialized in aerobic metabolism during aerobic exercise.

An increase in cytosolic calcium concentration leads to activation of myosin phosphatase.

Muscles obtain energy from carbohydrates during the short intense muscle work.

Heavy meromyosin has an ATPase activity and it is able to bind actin.