Water Soluble Vitamins Flashcards Preview

Digestive, Endocrine, and Metabolic Systems > Water Soluble Vitamins > Flashcards

Flashcards in Water Soluble Vitamins Deck (31):
1

The only water-soluble vitamin that can be toxic is _____.

B6

2

True or false: high levels of water-soluble vitamins do not affect tissue levels.

Most of the time, no – but chronic high intake can raise tissue levels

3

Riboflavin is also known as _____.

B2

4

B1, B2, and B3 are all involved in the ______.

TCA cycle

5

Thiamin is found in which foods?

Legumes, rice bran, and grains

6

Riboflavin is found in ______________.

dairy, eggs, and meats

7

Niacin is found in _______________.

meat, poultry, and corn (if the corn is treated with alkaline)

8

Thiamin deficiency is also called _______.

beriberi

9

Thiamin deficiency can present in what three ways?

- Dry: peripheral neuropathy, muscle tenderness, and foot drop
- Wet: edema, CHF
- Wernicke-Korsakoff: ophthalmoplegia, ataxia, confabulation, memory loss

10

What groups of people are at risk for thiamin deficiency?

Alcoholics
People receiving TPN without B1
Anorexics
SE Asians (eating polished rice)

11

What is angular stomatitis and in what micronutrient deficiency does it present?

It is dry, cracked lips (at the commissure) and it presents in riboflavin deficiency.

12

Pellagra presents in B3 deficiency. What are the four "D" symptoms?

Diarrhea
Dementia
Dermatitis
Death

13

The ______________ in pellagra is usually symmetric.

dermatitis

14

Sun-sensitivity is a finding of ______________.

niacin deficiency

15

Dermatitis with ______________ presents with niacin deficiency.

hypopigmentation

16

Folic acid is crucial in ____________ transfers.

single-carbon (such as methylation and nucleic-acid synthesis)

17

Folic acid comes from ______________.

FOLIage (duh!), orange juice, and whole grains

18

Folate deficiency is common in ______________.

alcoholics, pregnant women, and the elderly

19

A normal level of segments in the nuclei of a neutrophil is ______________.

5 - 6

20

B12 helps reform tetrahydrofolate from ___________.

methylfolate

21

B12 is involved in the isomerization of methylmalonyl co-a to _______________.

succinyl co-a

22

Which B vitamin is only found in animal products?

B12

23

Absorption of ____________ is an active, saturable process. Thus, eating much more than the RDA leads to a large amount of excretion (expensive pee and poop).

ascorbic acid (vitamin C)

24

Joint pain (and refusal to walk) is a sign of _________ deficiency.

vitamin C

25

Those with bariatric surgery are at increased risk for ___________.

BERIberi (get it?)

26

You can actually precipitate Wernicke-Korsakoff syndrome by _____________.

refeeding a starved person without giving supplemental thiamin

27

Tryptophan is a precursor for __________ and can actually prevent deficiency in that enzyme.

niacin

28

Why does carcinoid tumor lead to niacin deficiency?

Because it shunts tryptophan away from niacin production

29

B6 deficiency presents with _____________.

anemia, glossitis, and neurologic problems

30

The neurologic effects of ______ deficiency are irreversible.

B12

31

Which vitamin helps convert tryptophan to serotonin and dopamine to norepinephrine?

Vitamin C

Decks in Digestive, Endocrine, and Metabolic Systems Class (133):