Vitamins Flashcards
Name the 4 fat-soluble vitamins
ADEK
Name the site for storage for fat-soluble vitamins
Liver
Why it is uncommon for water soluble vitamin to have hypervitaminosis
Excess are removed by excretion
Name the 4 VitaminA derivative
Beta-carotene, Retinal, Retinoic acid, isotretinoin
What is the chemical name for Vitamin A
Retinol
What is the function for Beta-carotene
As anti-oxidant
What is the function of Retinal
To make rhodopsin
What is the funciton of retinoic acid
A nuclear hormone that binds to TF and contributes to proper differentiation of epithelial cells
Name the problems for hypovitaminosis A
Night blindess (As there is a lack of rhodopsin in Rod cell)
Keratomalacia (As vitamin A affects the growth and differentiation of epithelial cells, its deficiency produces defective epithelialisation and corneal softening and opacity[clouding])
Permanent blindness
Growth impediment, impair wound healing
What is the problem for hypervitaminosis A
liver toxicity, birth defects of infants
What is the chemical name for Vitamin D
cholecalciferol
What is the form that converted to vitamin D under UV
7-dehydrocholecalciferol
What is the form of vitamin D in diet
cholecalciferol, ergocalciferol
What is the form of Vitamin D for storage
25-hydroxylcholecalciferol
What is the active form of Vitamin D and where is it formed
1,25-dihydroxylcholecalciferol in KIdney
What is the function of Vitamin D
To maintain calcium level when plasma calcium level drops
What is the cause of hypovitaminosis D
Inadequate exposure to sunlight
Disruption of lipid absorption
Inadequate dietary intake
Poor liver and kidney function
Hypoparathyoidism
What are the problems of hypovitaminosis D
Rickets in children, osteomalacia in adults
What is the problem of hypervitaminosis D
Hypercalcemia, deposition of Calcium in organs like kidneys and arteries and hypercalciuria that forms kidney stone