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Which of the following are functions of the kidneys?
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25. The Urinary System
The Kidneys
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The active form of which vitamin is produced in the kidneys?
A
Vitamin A
B
Vitamin C
C
Vitamin B12
D
Vitamin D
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Understand that vitamins can have active forms that are produced or activated in specific organs of the body.
Recognize that Vitamin D is unique among vitamins because it requires activation in the kidneys to become its active form.
Learn that Vitamin D is initially synthesized in the skin as cholecalciferol (Vitamin D3) when exposed to sunlight.
Know that cholecalciferol is then converted in the liver to calcidiol, which is further converted in the kidneys to calcitriol, the active form of Vitamin D.
Remember that calcitriol plays a crucial role in calcium and phosphate metabolism, which is essential for maintaining healthy bones.
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