Additionally, there is a movement of calcium into and out of the body, and one should remember that massive amounts of calcium are locked into the mineralised components of bone and teeth. It follows that the management of body calcium must be well regulated. There is a small obligate loss of calcium from the body through faeces, urine, sweat and in the lactating woman, milk. Initially gastric acids put calcium salts into solution, which is essential for absorbtion in the duodenum. It can be divided into 2 components - 1.
Hysterical patients hyperventilate.
Additionally bone provides a long-term depot for calcium, by the formation of bone. Osteoblasts Bone can also provide a source of plasma calcium when this is low for any particular reason. Osteoclast activity Kidney - cistern effect. This is the final active product of vitamin D metabolism. The parathyroids respond directly to the calcium concentration of the perfusing blood.