Vitamins

Question 1

What is precursor of Vitamin A?

Answer 1

carotene

Question 2

Deficiency signs of Vitamin A

Answer 2

1. night blindness (not enough rhodopsin)
2. bulging eyes
3. anorexia
4. keratinization of respiratory epithelial
5. drowsiness

Question 3

How is vitamin D synthesized?

Answer 3

Cholesterol -(sun)->
cholecalciferol –>
1,25 dihydroxycholecaliferol

Question 4

What are precusors of vitamin D in the diet?

Answer 4

ergocalciferol (plant)
calciferol (animal)

Question 5

What does vitamin D do?

Answer 5

stimulate Ca and P absorption/resorption

Question 6

Deficiency signs of Vitamin D

Answer 6

rickets or osteomalacia

Question 7

What does vitamin E do?

Answer 7

functions as a powerful antioxidant

Question 8

Active form of Vitamin E

Answer 8

alpha-tocopherol

Question 9

Deficiency signs of Vitamin E

Answer 9

1.muscular lesion
2. reproductive failure
3. cell permeability
4. liver necrosis
5. Birds have encephalomalacia and exudative diathesis

Question 10

Deficiency signs of vitamin K

Answer 10

1. increased blood clotting times
2. hemorrhaging

Question 11

What does thiamin do?

Answer 11

involved in TCA cycle decarboxylation

Question 12

Deficiency signs of thiamin?

Answer 12

1. bradycardia
2. disruption of carbohydrate and lipid metabolism
3. enlarged adrenal gland

Question 13

Deficiency sign of riboflavin?

Answer 13

1. reduced average daily gain
2. adrenal hemorrhaging
3. kidney damage

Question 14

Deficiency sign of niacin?

Answer 14

1. decreased appetite
2. diarrhea
3. vomiting
4. black tongue (dogs)

Question 15

What does pantothenic acid do?

Answer 15

functions as a component of Coenzyme A, which is involved in fatty acid metabolism

Question 16

Deficiency sign of pantothenic acid?

Answer 16

1. dermatitis (birds)
2. goose stepping (pigs)

Question 17

How is B6 added to diets?

Answer 17

pyidoxine, pyridoxal, and pyridoxamine

Question 18

Deficiency sign of B6?

Answer 18

1. demyelination of peripheral nerves
2. immunosuppression
3. seizures

Question 19

Source of B12?

Answer 19

bacteria

Question 20

Deficiency signs of B12

Answer 20

1. kidney and liver damage
2. high abortion rates
3. poor feathering

Question 21

Deficiency signs of biotin?

Answer 21

1. Skin lesions
2. dermatitis
3. alopecia
4. hind leg spasms
5. cracked hooves

Question 22

What is vitamin C called?

Answer 22

ascorbic acid

Question 23

Deficiency signs of vitamin C

Answer 23

1. weight loss
2. edema
3. diarrhea