QS Study

Functions of Calcium (Ca++) ion

The calcium in the blood is vital for a number of functions, including blood clotting, diffusion of nerve impulses, muscle contraction, the constancy of cell membranes, and cell metabolism. The body of a young adult human contains 27.5 mol of Ca 99% of Ca2+ is in the skeleton. It plays an essential function in excitation-contraction coupling of both cardiac and vascular smooth muscles and has significant efficient interactions with other cations, including sodium, potassium, and magnesium.

Functions of Ca2+ is required for –

  • Chief mineral in the formation and hardness of bone and teeth.
  • Cell membrane permeability.
  • Coagulation,
  • Muscular contraction,
  • Necessary for contraction of the muscle.
  • Activation of digestive enzyme e.g., trypsin, amylase.
  • 2nd messenger in some hormonal action.
  • Discharged neurotransmitter (Nerve function).
  • The function of N-M junta.
  • Mitosis in thymus and bone marrow.
  • Synthesis of nucleic acids.
  • Maintenance of cardiac rhythmicity.
  • Essential for milk production.
  • Controls the membrane potentials in neu­rons.