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Questions and Answers
Which vitamin is formed from 7-dehydrocholesterol in animals?
Which vitamin is formed from 7-dehydrocholesterol in animals?
- Vitamin E
- Vitamin K
- Vitamin D3 (correct)
- Vitamin D2
What is the primary function of vitamin D in maintaining calcium levels in the blood stream?
What is the primary function of vitamin D in maintaining calcium levels in the blood stream?
- Enhancing iron absorption
- Promoting sodium retention
- Stimulating potassium excretion
- Intestinal calcium absorption (correct)
From which source is ergocalciferol (vitamin D2) formed?
From which source is ergocalciferol (vitamin D2) formed?
- Renal calcium reabsorption
- Ergosterol in plants (correct)
- Egg and liver
- 7-dehydrocholesterol in animals
Which vitamin is formed from ergosterol in plants?
Which vitamin is formed from ergosterol in plants?
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What is the role of vitamin D in bone calcium resorption?
What is the role of vitamin D in bone calcium resorption?
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How does vitamin D affect phosphate absorption and reabsorption?
How does vitamin D affect phosphate absorption and reabsorption?
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Study Notes
Vitamin D Formation
- Vitamin D is formed from 7-dehydrocholesterol in animals.
Vitamin D Function
- The primary function of vitamin D is to maintain calcium levels in the blood stream.
Ergocalciferol (Vitamin D2)
- Ergocalciferol (vitamin D2) is formed from this source in fungi.
Vitamin D Formation in Plants
- Vitamin D is formed from ergosterol in plants.
Vitamin D and Bone Calcium Resorption
- Vitamin D plays a role in bone calcium resorption.
Vitamin D and Phosphate Absorption/Reabsorption
- Vitamin D promotes phosphate absorption and reabsorption.
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