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7 Cards in this Set
- Front
- Back
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Thyroid Hormone
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Needs iodine
Maintains metabolic rate Maintenance of development of nervous system Regulates growth |
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Calcitonin
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Lowers blood calcium
Feedback system - ^ blood calcium calcitonin secretion calcium bone |
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Parathyroid Hormone
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Raises blood calcium levels
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Thyroid Hormone
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see pg. 622 for synthesis, storage, and secretion
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Calcitonin
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lowers blood calcium by inhibiting breakdown of bone by osteoclasts ( calcium stays in the bones) and stimulating excretion of Ca by the kidneys
Calcitonin responds directly to an elevation in concentration of blood calcium |
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parathyroid Glands
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Parathyroid cells are also called chief cells or principal cells
Also monitor blood calcium levels PTH is secreted when blood calcium levels are low - parathyroid hormone elevates blood calcium by Mobilizing calcium from the bones (breakdown by osteoclasts), reduces urinary excretion of calcium, and increases absorption of calcium from the digestive tract by stimulating the formation of calcitriol |
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Calcitriol
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Steroid hormone
Secreted by the kidneys in response to PTH Functions to stimulate calcium and phosphate absorption from the digestive tract |
