Endocrinology/CaHomeostasis/IntroToCaHomeostasis
Calcium Homeostasis
Calcium in the diet is absorbed from the small intestine into the blood (1). Most calcium in the body is stored in the bones. This calcium store can be mobilized leading to the release of calcium into the blood. This is defined as “bone resorption”. This weakens the bone (2). The movement of calcium from the blood to the bone is known as deposition and storage. This strengthens the bone (3). Most calcium is removed from the body through excretion by the kidneys (4).
Challenge Quiz
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<GIFT> //LEVEL:2 //RAND When calcium is absorbed by the small intestine, blood calcium concentration {~=increases~decreases}.
//LEVEL:2 //RAND The greatest store of calcium in the body is the {~intestinal tract~=bones~blood~kidneys}.
//LEVEL:2 //RAND The mobilization of the calcium store in the bone will produce a {~=increase~decrease} in blood calcium concentration.
//LEVEL:2
//RAND
When calcium is released from bone, blood calcium concentration {~=increases~decreases}.
//LEVEL:2
//RAND
If there is bone resorption, blood calcium concentration {~=increases~decreases}.
//LEVEL:2
//RAND
If there is bone deposition, blood calcium concentration {~increases~=decreases}.
//LEVEL:2
//RAND
Storage of calcium in bone will produce a {~increase~=decrease} in blood calcium concentration.
//LEVEL:2
//RAND
Excretion of calcium by the kidney will produce a {~increase~=decrease} in blood calcium concentration.