Fat Soluble Vitamins Flashcards
What is Vitamin D’s overall function in the body?
To increase Calcium
Where does Vitamin D act?
1) Distal renal tubule
2) Duodenum
3) Destroys Bone
What does Vitamin D do at the Distal Renal Tubule?
Increases absorption of calcium
What does Vitamin D do at the duodenum?
Increases resorption of calcium
What does Vitamin D activate?
Osteoclasts
Which form of Vitamin D is stored/inactive?
25-OH-D3
Which form of Vitamin D is active?
1,25(OH2)-D3
Where is 25-OH-D3 found?
Liver
Where is 1,25(OH2)-D3 found?
Kidney
What does a Vitamin D deficiency in children cause?
Rickets
What does a Vitamin D deficiency in adults cause?
Osteomalacia
What clinical symptom does Vitamin D deficiency cause?
Bowing of the legs
Vitamin A is an:
Antioxidant
Vitamin A’s antioxidant abilities allow it to be used as treatment for:
1) Measles
2) Retinitis Pigmentosa
Vitamin A deficiency causes:
Night blindness
Why does Vitamin A deficiency cause night blindness?
Because Vitamin A helps with the ability to see light.
Vitamin A causes what to activate?
Epithelial cell differentiation
What happens if you take too much Vitamin A?
1) Alopecia
2) Abnormal birth defects
What is Vitamin K used to form?
Clotting factors
Which clotting factors does Vitamin K help form?
1) Factors 2,7,9,10
2) Proteins C and S
Which drug inhibits Vitamin K’s ability to make clotting factors?
Warfarin
Vitamin K is mostly found in:
Green/leafy vegetables
Vitamin K is a co-factor of:
Gamma-carboxylation
Vitamin K is usually made by:
Gut flora
Newborns generally need which Vitamin supplement?
Vitamin K
Newborns who did not receive a Vitamin K supplement may have problems with:
Gamma carboxylation
Vitamin E is an:
Antioxidant
Which 2 Vitamins are antioxidants?
1) Vitamin A
2) Vitamin E
What are the functions of Vitamin E?
Prevents the peroxidation of fatty acids
Vitamin E guards against:
Arteriosclerosis