Bible verses on deliverance from captivity

Factors affecting calcium absorption ppt

Absorption. Calcium is absorbed by active transport (transcellularly) and by passive diffusion (paracellularly) across the intestinal mucosa. Active transport of calcium is dependent on the action of calcitriol and the intestinal vitamin D receptor ().This transcellular mechanism is activated by calcitriol and accounts for most of the absorption of calcium at low and moderate intake levels.