Podcast
Questions and Answers
What is the primary pro vitamin D source in human and animal tissues?
What is the primary pro vitamin D source in human and animal tissues?
- Cholecalciferol
- 7-dehydrocholesterol (correct)
- Ergosterol
- Calcidiol
Which form of vitamin D is considered the active form?
Which form of vitamin D is considered the active form?
- Calcidiol
- Calcitriol (correct)
- Ergocalciferol
- 25-OH-D
Which of the following is a consequence of vitamin D deficiency in children?
Which of the following is a consequence of vitamin D deficiency in children?
- Bone deformities (Rickets) (correct)
- Hemolysis of red blood cells
- Renal stones
- Infertility
What is a symptom of vitamin E deficiency?
What is a symptom of vitamin E deficiency?
Excessive intake of vitamin D can lead to which of the following conditions?
Excessive intake of vitamin D can lead to which of the following conditions?
Flashcards
Vitamin D activation process
Vitamin D activation process
Ergosterol (plant) or 7-dehydrocholesterol (human/animal) is converted to vitamin D2(calciferol) by UV light. The liver converts calciferol to 25-hydroxyvitamin D, then the kidneys convert this to the active form, calcitriol.
Vitamin D function
Vitamin D function
Vitamin D regulates calcium and phosphate levels in the blood and promotes bone health by assisting in calcium and phosphate absorption.
Vitamin D deficiency symptoms
Vitamin D deficiency symptoms
Deficiency in children causes rickets (bone deformities), and in adults, osteomalacia (softened bones).
Vitamin E types
Vitamin E types
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Vitamin E function
Vitamin E function
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Study Notes
Vitamin D (Calciferol)
- Vitamin D is a steroid ring
- Ergosterol is the provitamin D in plants
- 7-dehydrocholesterol is the provitamin D in humans and animals
- Vitamin D has 2 forms: D2 and D3
- Vitamin D activation involves UV light, liver, and kidney
- Activated forms include calcifediol (25-OH-D) and calcitriol (1,25(OH)2D)
Vitamin D Function
- Normalizes serum calcium and phosphate levels
- Normalizes bone by providing calcium and phosphate
Vitamin D Deficiency
- Rickets in children (bone deformities)
- Osteomalacia in adults (softening of bones)
Vitamin D Excess (Hypervitaminosis)
- Abnormal calcification of tissue and deposition of calcium and phosphate in the kidney (renal stones)
Vitamin E (Tocopherols)
- Four types: α, β, γ, and δ
- α-tocopherol is the most active form
- Function:
- Anti-sterility
- Antioxidant
- Protects from atherosclerosis and heart disease (prevents LDL oxidation)
Vitamin E Deficiency
- RBC hemolysis (due to oxidation) in premature infants
- Infertility
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Description
This quiz covers essential information about Vitamins D and E, including their structures, functions, and deficiency effects. Participants will explore the roles of these vitamins in human health, such as the impacts of their insufficiency and excess. Test your knowledge on these vital nutrients and their biological significance.
