41.In which of the following individuals would vitamin A toxicity be most likely to occur?

a.adolescent women

b.overweight adults

c.those taking vitamin A supplements

d.those consuming more than 100 g of carrots daily

42.What colour does the skin turn when an individual suffers from hypercarotenemia?

a.purple

b.orange

c.yellow

d.red

43.What is the approximate adult RDA for vitamin A?

a.400 mg

b.1000 mg

c.800 retinol activity equivalents

d.5000 retinol activity equivalents

44.Which of the following is likely to induce vitamin A toxicity in adults?

a.eating beef liver once a month

b.consuming high-dose vitamin A supplements

c.drinking 2 quarts of vitamin A-fortified milk daily

d.consuming large amounts of dark green and deep orange vegetables

45.Which of the following is a characteristic of carotenoids in foods?

a.Most carotenoids can be converted to vitamin A.

b.The carotenoid with the highest conversion rate to vitamin A is lycopene.

c.Carotenoid absorption efficiency from salads is higher when regular dressing is used compared with low-fat dressing.

d.Carotenoid absorption is masked by foods rich in chlorophyll.

46.Which of the following is considered to be an unusual food source of vitamin A?

a.kefir

b.tofu

c.shrimp

d.beef liver

47.George wants to try a new leafy green vegetable in his salad.  Which green, that is an excellent source of beta-carotene, would you suggest to George?

a.romaine lettuce

b.iceburg lettuce

c.spinach

d.arugula

48.As a dietitian, you are working on ways to improve the nutritional status of children in Indonesia. You discover that many of the children and some adults suffer from night blindness. Which of the following foods would you recommend be incorporated into the Indonesian diet to help prevent future generations from developing this condition?

a.sweet potato

b.orange juice

c.peanut butter

d.powdered skim milk

49.A person seeking good sources of vitamin A should avoid which one of the following foods?

a.liver

b.bananas

c.apricots

d.sweet potatoes

50.Which of the following foods is a very good source of vitamin A?

a.corn

b.pumpkin pie

c.baked potato

d.whole-grain bread