Contemporary Endocrinology Volume 18, 1999, pp 221-234

Calcium Requirements and Sources in Postmenopausal Women

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Abstract

Calcium is an important constituent of bones and teeth and plays a vital role in a number of physiologic and biochemical processes, including the blood coagulation cascade, enzyme activity, release of hormones and neurotransmitters, and regulation of nerve and muscle function. It is also an important mediator of intracellular hormone action where it functions as a second messenger. Cell division and secretion are initiated by the movement of calcium from the extracellular compartment to the cytosol.