Calcium Ion Homeostasis (Systemic)

Calcium ion homeostasis refers to the tightly regulated process by which the body maintains stable levels of calcium ions in the blood and extracellular fluid. This is essential for numerous physiological functions, including muscle contraction, nerve conduction, blood coagulation, hormone secretion, and bone metabolism. Key regulatory systems include the skeletal, endocrine, digestive, and urinary systems. Principal hormones involved are parathyroid hormone (PTH), 1,25-dihydroxyvitamin D3 (Calcitriol), and calcitonin. Maintaining systemic calcium homeostasis is critical; imbalances like hypocalcemia and hypercalcemia can cause various health issues.

This is a physiological process and not directly targeted by a single drug mechanism. Drugs impact the individual components involved in calcium homeostasis, such as PTH, Vitamin D receptor, and osteoclasts.