Parathyroid Gland Flashcards
1
Q
Parathyroid hormone
A
Released in response to decreased calcium levels, also controls phosphate levels to excrete excess in urine by decreasing secretion of calcium and increasing bone reabsorption to release calcium from bones
Increases calcium by stimulating the skeleton (osteoclasts-bone reabsorbing cells digest calcium rich bony matrix and release ionic calcium and phosphates into blood), kidneys (enhances reabsorption of calcium but kidneys have to convert Vit d to calcitrol first) and intestines (promotes activation of Vit d thereby increasing absorption of calcium by intestinal mucosal cells)
Needs normal Vit D levels to do this
