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11 Cards in this Set
- Front
- Back
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vitamin A is stored in liver as |
Retinyl palmitate |
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Where is retinyl palmitate stored |
1. Stellate cells 2. Ito cells Of liver |
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How Is rhodopsin formed |
11-cis-retinal (active form) + opsin = rhodopsin |
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Most potent form of vit A |
Retinoic acid |
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Which gene expression is regulated by Retinoic acid |
Homeobox/hox gene This is important for embryogenesis |
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Only teratogenic vitamin |
Retinoic acid Thymus damaged in foetus |
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Toxicities of vitamin A |
1. Teratogenicity 2. Lysosomal membrane damage 3. Pseudotumour cerebri 4. Hepatic/portal fibrosis |
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Precursor for vitamin D synthesis |
7 dehydrocholesterol |
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Rate limiting step in synthesis of calcitriol |
25-hydroxycholecalciferol to calcitriol using enzyme 1-alpha-hydroxylase |
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Most toxic vitamin |
Vit D |
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Most common toxicity of vit D |
Nephrocalcinosis |
