Question 1 of 25
4.0 Points
Vitamin A supplements are not necessary for most adult Americans as they have
significant reserves in
A. the eye.
B. the skin.
C. the kidney.
D. the liver.
Question 2 of 25
4.0 Points
Which of the following is NOT involved in antioxidant defense?
A. glutathione peroxidase
B. superoxide dismutase
C. catalase
D. hydrogen peroxide
Question 3 of 25
4.0 Points
Retinal, retinol, and retinoic acid are all forms of
A. vitamin A.
B. vitamin K.
C. vitamin D.
D. vitamin E.
Question 4 of 25
4.0 Points
The most likely cause of a vitamin A toxicity would be
A. consuming large amounts of dark green and yellow vegetables.
B. eating sautéed liver and onions twice a week.
C. consuming high levels of vitamin A supplements.
D. drinking carrot juice twice a day.
Question 5 of 25
4.0 Points
After absorption, the fat-soluble vitamins are distributed to body cells by
A. free fatty acids.
B. lipases.
C. mucopolysaccharides.
D. lipoproteins.
, Question 6 of 25
4.0 Points
Beta-carotene is also called
A. provitamin A.
B. retinal or retinol.
C. calcitriol.
D. rhodopsin.
Question 7 of 25
4.0 Points
A primary function of vitamin E is to serve as
A. a coenzyme.
B. an antioxidant.
C. a hormone.
D. a peroxide.
Question 8 of 25
4.0 Points
Of the following population groups, those at highest risk for vitamin E deficiency are
A. premature infants.
B. the elderly.
C. athletes.
D. smokers.
Question 9 of 25
4.0 Points
Vitamin E is carried to the liver and other tissues by
A. albumin.
B. hemoglobin.
C. lipoproteins.
D. retinol-binding proteins.
Question 10 of 25
4.0 Points
A leading cause of blindness in the world today (excluding accidents) is a dietary
deficiency of
A. vitamin A.
B. vitamin D.
C. vitamin E.
D. vitamin K.