31. Which of the following vitamins does not play a known role in bone metabolism and health?

A. vitamin A

B. vitamin D

C. vitamin E

D. vitamin K

32. Which of the following foods are good sources of vitamin K?

A. green vegetables

B. fish

C. poultry

D. grains

33. Fat-soluble vitamins are absorbed primarily in the

A. stomach.

B. duodenum.

C. jejunum.

D. ileum.

34. Fat and muscle tissues are the main storage depot for

A. vitamin A.

B. vitamin B.

C. vitamin D.

D. vitamin E.

35. After absorption, fat-soluble vitamins are packaged into ________ and transported along with other lipids.

A. esters

B. micelles

C. carotenoids

D. chylomicrons

36. All of the following procedures help to preserve the vitamin content of foods except

A. cooking vegetables in a small amount of water.

B. cooking vegetables in the microwave.

C. storing produce in the refrigerator.

D. rinsing rice before cooking.

37. Foods that have additional vitamins added to them are called ________ foods.

A. enhanced

B. improved

C. modified

D. fortified

38. The condition of soft, weak bones in children caused by a deficiency of vitamin D is called

A. rickets.

B. catatracts.

C. rhodopsin.

D. osteoporosis.

39. What light-sensitive protein dependent on vitamin A helps us to see?

A. RBP

B. retinal

C. iodopsin

D. retinoic acid

40. The formation of calcitriol, the active form of vitamin D, is a two-step process that begins in the

A. skin.

B. blood.

C. liver.

D. kidneys.