Vit A

Question 1

2 families of vitamers

Answer 1

Retinoids (found in animal products) & Carotenoids (yellow-orange plant pigments….ex: beta-carotene)

Question 2

Role

Answer 2

Involved in gene expression and cell differentiation 
AND
Maintains normal epithelial cell function
AND
 Cofactor with rhodopsin (visual pigment in the eye)

Question 3

Sources

Answer 3

Vitamin A in animal products (eggs, dairy)
AND
Provitamin A in fruits & veggies (orange, yellow & dark green)

Question 4

Deficiency

Answer 4

Xerophthalmis (nigh blindness)

Question 5

Excess

Answer 5

nausea, vominitg, liver damage, orange skin