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10 Cards in this Set
- Front
- Back
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Coordinated by these organs |
Bone Kidney Intestine |
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Controlled by these hormones |
Parathyroid Calcitonin 1,25-dihydroxycholecalciferol (Active form of vitamin D) (kidney converts this) |
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Stimulator of parathyroid hormone |
Low levels of Ca2+ at |
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Effect of PTH |
CAlcium resortption from bone Promotes Ca2+ resorption in the thick ascending limb and distal convoluted tubule Hydroxylate 25-OH vit D into 1,25 OH vit D Inhibits phosphate reabsorption in the proximal and distal tubule At intestine, promotes Ca2+ reabsorption secondary to production of active vitamin D made by PTH in the kidneys |
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Why we don't want both phosphate and calcium high at the same time |
Formation of crystals (calcium phosphate salt) Ultimately decreases blood calcium level |
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Calcitonin production site |
Thyroid gland |
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Calcitonin trigger |
Ca2+ above normal |
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Calcitonin effects |
Reduce bone resorption by reducing osteoclast action |
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Sex hormones that maintain bone |
Testosterone Estradiol (reduction of this after menopause associated with osteoporosis) |
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Glucocorticoid excess leads to |
Osteoporosis Inhibits osteoblasts Inhibits gastrointestinal calcium absorption |
