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Flashcards in Fat soluble vitamins Deck (79)
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1

what are the fat soluble vitamins

ADEK

2

how are fat soluble vitamins different from water soluble vitamins

1. Require bile for absorption
2. Travel thru lymphatic system within chylomicrons before entering bloodstream
3. Many require protein carriers in bloodstream
4. Excess stored in liver & adipose tissue
5. Not readily excreted
6. Greater risk of toxicity

3

Upper limits have been established for what vitamins

A,D, and E

4

what is the alcohol form of vitamin A

retinol

5

what are is the precursor for vitamin A

beta carotene

6

what is carotenoid

orange pigment found in plants

7

T/F beta carotene also acts as an antioxidant

true

8

how is vitamin A transported

retinol binding protein

9

how does vitamin a transportation work

retinol binding protein picks up vitamin a from the liver and carries it in the blood

10

what are some forms of retinoids

1. retinol
2. retinal
3. retinoic acid

11

what does retinol do

major storage form; important for reproduction

12

what does retinal do

aldehyde form of vitamin A; vision

13

what does retinoid acid do

acid form; hormones/growth

14

retinoids are converted to __ in the intestine

retinol

15

Foods from animals provide ___ readily digested and absorbed as retinol in the intestine

retinyl esters

16

foods from __ provide carotenes

plants

17

Beta carotene can be split to form retinol in the

intestine and liver

18

__can be converted to other active forms of vitamin A

Retinol and Retinal

19

Vitamin A is transported from the __ to the _

lymphatic system, liver

20

__transports vitamin A from the liver in the blood

Retinol Binding Protein (RBP)

21

Cells using vitamin A have

special protein receptors for it

22

what are the primary functions of vitamin A

1. Promote vision (retinal)
2. Protein synthesis & cell differentiation
-Health of epithelial tissues and skin
3. Support reproduction (retinol)
4. Acts as hormone regulating growth, cell differentiation, embryonic development (retinoic acid)

23

how does vitamin A support vision health

1. Maintains clear cornea
2. Participates in conversion
of light energy into nerve impulses in the retina
3. Rhodopsin:
light sensitive pigment of the retina (contains retinal form of Vitamin A & protein opsin)

24

what is cell differentiation

Process by which each type of cell develops to perform a specific function

25

what tissues are on the outside of the skin

skin-Epithelial tissue

26

what tissues are on the inside

Inside-Mucous membranes
mucus-secreting cells; line the surfaces of body tissues

27

Vitamin A promotes differentiation of

epithelial cells & goblet cells (secrete & synthesize mucus)

28

what does mucus do

coats & protects epithelial cells from microorganisms and harmful substances

29

Retinol participates in __development

sperm

30

Vitamin A supports __ in pregnancy

normal fetal development