Chapter 11 Quiz: The Fat-Soluble Vitamins: A, D, E, and K

How many sun exposure minutes are necessary for sufficient vitamin D synthesis, even with an SPF of 15 or 30?

10 to 20 minutes

Which statement accurately describes the relationship between vitamin A and acne?

Accutane (isotretinoin), made from vitamin A, is effective against cystic acne.

One ounce of which food provides more than three times the Recommended Dietary Allowance (RDA) for vitamin A?

Beef liver

The production of which protein slows in response to vitamin D deficiency?

Calbindin

The beta-carotene in dark green, leafy vegetables is abundant but masked by large amounts of which pigment?

Chlorophyll

Which health problem occurs in premature infants born before the transfer of vitamin E from the mother to the infant in the last weeks of pregnancy?

Erythrocyte hemolysis

Foods rich in vitamin C seem to protect against certain cancers, especially which type?

Head and neck

One of vitamin K's best sources is the bacteria found in the gastrointestinal (GI) tract, but infants are born with a sterile GI tract. Therefore, a single dose of vitamin K is given at birth to prevent which health problem?

Hemorrhagic disease

The World Health Organization and UNICEF recommend two doses of vitamin A supplements, given 24 hours apart, for all children with which health condition?

Measles

Without vitamin K, which substance cannot bind to the minerals that normally form bones, resulting in low bone density?

Osteocalcin

Which food is NOT a source of vitamin D?:

Red meat

Which of the following vitamin A compounds binds with opsin to form rhodopsin?

Retinal

Which of the following vitamin A compounds acts like a hormone, regulating cell differentiation, growth, and embryonic development?

Retinoic acid

Which of the following is true about free radicals?

They are unstable and highly reactive molecules.

Which statement is NOT true of vitamin E?

Vitamin E is the most toxic of all the vitamins.