Physiology General physiology 38ce90f3 Calmodulin acts by A Opening of Na+ channels B Phosphorylation of myosine by protein kinase C Activation of Na+-K+ pump D Dephosphorylation by protein kinase High-Yield Explanation Calmodulin contains myosin light-chain kinase, which phosphorylates myosin and phosphorylase kinase which activates phosphorylase.(Ref: Textbook of physiology AK JAIN 5th edition page no.20)