Ch 7 Quizzes/Concept Checks

Deficiency in the water-soluble vitamins, _____ and _____, contribute to anemia, and a deficiency in _____ causes pellagra. Options: B12 iron folate riboflavin niacin

B12 folate niacin

B12 supplements mask a folate deficiency. a. True b. False

b

Which statement is true of vitamin C? a. Vitamin C impedes the absorption of iron in food. b. Vitamin C acts as an antioxidant. c. Vitamin C is challenging to obtain from food. d. Vitamin C is stored in fat.

b

The plant-derived precursor to vitamin A is _____.

beta-carotene

Choose the situation that decreases the body's ability to make vitamin D. a. young age b. lighter skin c. living in the northern United States d. living in a warmer climate

c

What are the fat-soluble vitamins? a. All the B vitamins and vitamin C b. B6, B12, and vitamin C c. Vitamins A and E, thiamin, and niacin d. Vitamins A, D, E, and K

d

Which of the following is NOT a characteristic of the fat-soluble vitamins? a. They are stored in the liver and fatty tissues. b. The fat-soluble vitamins are absorbed similarly to fat absorption. c. They are not readily excreted and tend to build up in tissues. d. Toxicities are unlikely, even when taking supplements.

d

Which of the following is NOT a major function of vitamin A? a. reproduction and growth b. cell differentiation c. immune function d. muscle contraction and nerve transmission

d

The nutrient needed for the absorption of fat-soluble vitamins is _____.

fat

Vitamin A and _____ are fat-soluble vitamins that act like hormones. Options: vitamin E vitamin D vitamin K vitamin C

vitamin D

When exposed to sunlight, the skin makes _____.

vitamin D

Active forms of vitamin A that are readily absorbed in the body are only found in foods derived from animals. a. True b. False

a

All of the following are good food sources of vitamin D EXCEPT: a. citrus fruits. b. salmon. c. tuna. d. fortified milk.

a

All of these statements are true EXCEPT which one? a. Vitamins are essential, caloric nutrients that are needed in tiny amounts. b. Fat-soluble vitamins require bile to be absorbed in the body. c. Vitamins A, D, E, and K are fat-soluble. d. Fat-soluble vitamins are stored, and therefore overconsumption may lead to toxicity.

a

Compounds that when consumed are converted into active vitamins are _____, also called provitamins.

precursors