NUTR 132 Lecture Notes - Lecture 8: Calcifediol, Ergosterol, Calcitriol
6 Dec 2018
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Travel to liver, converted to 25-hydroxyvitamin d main form of vitamin d found in blood. Chemically converted in kidneys to 1, 25-dihydroxyvitamin d . The biologically active form of vitamin d. d: vitamin d: functions, maintains calcium and phosphorus levels in blood. b. Reduction of inflammation: binds to and affects cells of: Reproductive organs: controls growth of parathyroid gland, may decrease certain types of cancer risk, functions: vitamin d regulates calcium, regulates absorption of calcium and phosphorus from small intestine. b. In combination with p t h and calcitonin, it regulates calcium excretion via kidney. i. ii. Causes the kidneys to reduce calcium excretion in the urine. Releases calcium from bone by stimulating osteoclast activity: through bone remodeling. i. Vitamin d regulates blood calcium d: vitamin d & size exposure, amount of sun exposure needed to activate vitamin d is affected by: i. ii. iii. iv. v. vi.
