Systemic calcium pool

The systemic calcium pool refers to the total amount of calcium available within the extracellular fluid and the skeletal reservoir, which is vital for maintaining physiological stability. It plays a fundamental role in structural support through bone mineralization, as well as in dynamic processes such as muscle contraction, neurotransmitter release, and blood clotting (StatPearls: Physiology, Calcium, 2023). Homeostasis of this pool is tightly regulated by the parathyroid glands, kidneys, and intestines, primarily through the actions of parathyroid hormone (PTH) and vitamin D (NIH Office of Dietary Supplements, 2023). While the pool itself is a physiological compartment rather than a single molecular receptor, it is the primary focus of treatments for metabolic bone diseases like osteoporosis and electrolyte disorders like hypercalcemia (PubMed: PMC5356990). Therapeutic agents may act by directly increasing the pool via supplementation or by influencing the cellular mechanisms that govern calcium flux between bone and blood (Wikipedia: Calcium in biology, 2024).

Other names

Extracellular calcium poolSerum calciumIonized calciumTotal body calcium

Drugs interact with the systemic calcium pool by providing direct elemental supplementation, inhibiting bone resorption to prevent calcium release, or modulating hormonal regulators like PTH and Vitamin D to alter intestinal absorption and renal excretion.