Fat Soluble Vitamins

Question 1

Name the two classses of vitamin E

Answer 1

Tocopherols and tocotrienols

Question 2

Name of vitamin K synthesied by the bacteria

Answer 2

menaquinone (K2)

Question 3

How is vitamin E mainly transported through circulation, after leaving the liver

Answer 3

Via lipoproteins - VDVL, LDL and HDLs

Question 4

Name antagonists of vitamin K

Answer 4

Vitamin A and E

Question 5

How is vitamin K transported over the basolateral border

Answer 5

with micelles via passive diffusion

Question 6

What liver cells is vitamin A stored in?

Answer 6

Stellate

Question 7

What MACROnutrient may enhance vitamin A absorption

Answer 7

fat

Question 8

What is a nutrient that may impair the absorption of vitamin A?

Answer 8

Zinc

Question 9

Vitamin A circulate in plasma bound to?

Answer 9

cellular retinoid binding protein

Question 10

hydroxylation of vitamin D requires?

Answer 10

magnesium

Question 11

what is the hormone stimulating vitamin D metabolism ?

Answer 11

parathyroid hormone

Question 12

What is the main form of vitamin A?

Answer 12

Retinyl Esters

Question 13

Name 3 agonists of vitamin A and how they help

Answer 13

Zinc - vitamin A transport via RBP

Iron - conversion of B-carotene to Vit A

Fat - 70-90% if vitamin A is absorbed in presence of fat

Question 14

Name two antagonists of vitamin A?

Answer 14

Fibre - especially pectin bcos interferes with micelle formation

Excess vitamin E

Question 15

Name the 2 forms of vitamin D

Answer 15

D2 - ergocalciferol

D3 - cholecalciferol

Question 16

Name 3 agonsits of vitamin D

Answer 16

Sunlight
Cholesterol
Magnesium

Question 17

Name 1 antagonist of vitamin D

Answer 17

high phosphorus amounts

Question 18

What sources contain/synthesise vitamin D?

Answer 18

Shitake mushroom

The skin

Question 19

What are the two types of vitamin E?

Answer 19

Tocopherols

tocotrienols

Question 20

What is the main type of tocopherol? (Vitamin E)

Answer 20

a-tocopherol

Question 21

Name 2 agonists of vitamin E

Answer 21

Fat and bile salts

Question 22

Name 2 antagonists of vitamin E

Answer 22

High dose of vitamin E or vitamin K

Question 23

Name the 3 forms of vitamin K

Answer 23

Phylloquinone (isolated from plants)
Menaquinone (bacteria synthesised)
Menadione (synthetic)

Question 24

Name 3 agonists of vitamin K

Answer 24

bile salts, dietary fats, pancreatic juice

Question 25

name 2 antagnoists of vitamin K

Answer 25

vitamin A and E