Final Exam

Question 1

What are the primary dietary sources of Vitamin A?

Answer 1

Preformed vitamin A (retinol) is found in animal sources
Provitamin A (beta-carotene) - found as carotenoids in the plant foods carrots, cantaloupe, apricots, tomato juice, and spinach

Question 2

What are the functions of Vitamin A?

Answer 2

Formation of visual purple (rhodopsin) in the retina, which allows vision in dim light.
Formation and maintenance of mucosa (nose, mouth, GI tract, respiratory tract, etc.)

Question 3

What are the symptoms of Vitamin A deficiency?

Answer 3

Night blindness
Dry eyes
Dry skin

Question 4

What are the functions of Vitamin D?

Answer 4

Develop/maintain strong bones
Calcium and phosphorus absorption
Muscle contraction

Question 5

What are the primary dietary sources of Vitamin D?

Answer 5

Natural sources include fish and egg yolks
Fortified foods (like milk, cereals, cheese, juice, etc.)

Question 6

What are the symptoms of vitamin D deficiency?

Answer 6

Low calcium levels, which can cause osteoclastic activity, and eventually osteoporosis (increasing risk of fractures)