Leys- vitamins

Question 1

Measurements of vitamin levels in the blood relate more to ________ than to overall body status.

Answer 1

recent intake

Question 2

what act as coenzymes in many metabolic pathways

Answer 2

Water-soluble vitamins

Question 3

The body has no storage capacity for water-soluble vitamins except

Answer 3

B12

Question 4

Evidence is emerging that suggests an excess of some B vitamins can be _______

Answer 4

toxic

Question 5

Most vitamins are modified before they become active

Answer 5

yea…

Question 6

B Vitamins are co-enzymes in different types of reactions:

Answer 6

B1 – carboxylations
B2/B3 – oxidoreductases
B6 – transaminases
Biotin – carboxylases
Folic acid/B12 – single carbon transfers

Question 7

Lack of riboflavin causes

Answer 7

angular stomatitis

Question 8

is needed, indirectly, for DNA synthesis

Answer 8

Folic acid

Question 9

Inhibitors of ________ are used as antibiotics (trimethoprim) and cancer therapy (methotrexate).

Answer 9

folate reduction

Question 10

There is an increased demand for_____ during pregnancy

Answer 10

folic acid

Question 11

______ deficiency is one of the most common vitamin deficiencies

Answer 11

Folic acid

Question 12

_____ is concentrated in the liver

Answer 12

B12

Question 13

______ deficiency causes scurvy resulting in defective collagen synthesis

Answer 13

Vitamin C

Question 14

Lack of _____ also impairs immune function

Answer 14

vitamin C

Question 15

which type of vitamins can be more readily absorbed

Answer 15

water-soluble vitamins

Question 16

which kind of vitamin can be stored in tissue?

Answer 16

fat-soluble vitamins

Question 17

which fat-soluble vitamins can be toxic in excess

Answer 17

A and D

Question 18

which vitamin is teratogenic and should be avoided during pregnancy

Answer 18

vitamin A

Question 19

_______ is a signaling molecule that interacts with ligand-activated transcription factors

Answer 19

Retinoic acid

Question 20

Deficiency of _______ causes night blindness

Answer 20

vitamin A

Question 21

regulates calcium and phosphorous homeostasis

Answer 21

vitamin D

Question 22

The majority of vitamin D is produced by

Answer 22

UV exposure of skin

Question 23

Deficiency of vitamin D causes

Answer 23

demineralization of bones with increased susceptibility to fractures

Question 24

is link to early childhood caries

Answer 24

Vitamin D deficiency

Question 25

Vitamin K is necessary for

Answer 25

blood coagulation