PUBH 1517 Basic Nutrition - Chapter 11 Questions

PUBH 1517 Basic - How many forms of vitamin A are active in the body a b two c five d three e 1 four one status incorrect(0.0 correct d your answer

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1 How many forms of vitamin A are active in the body? a. four b. two c. five d. three e. one status: incorrect (0.0) correct: d your answer: a feedback: Incorrect. Less. (pg. 368) 2 Which of these exhibits vitamin A activity? a. gamma-tocopherol b. phylloquinone c. ergocalciferol d. carotenoids e. cholecalciferol status: incorrect (0.0) correct: d your answer: a feedback: Incorrect. Gamma-tocopherol is a member of a family of compounds that includes alpha-tocopherol, the active form of vitamin E. (pg. 380) 3 There are two major types of light receptors (photoreceptors) in the retina, rods and cones. Rods are responsible for vision in dim light and cones are responsible for vision in brighter light. Based on your knowledge of vitamin A, in which of these light receptors would you expect to find rhodopsin? a. cones, because blindness is a symptom of a vitamin A deficiency b. rods, because blindness is a symptom of a vitamin A deficiency c. both rods and cones d. cones, because night blindness is a symptom of a vitamin A deficiency e. rods, because night blindness is a symptom of a vitamin A deficiency status: incorrect (0.0) correct: e your answer: a feedback: Incorrect. The total blindness that is a symptom of a vitamin A deficiency is related to the cornea, not to the eye's photoreceptors. (pg. 371) 4 What aspect of vitamin A function should make a pregnant woman especially wary of vitamin A toxicity? a. the role vitamin A plays in the maintenance of mucous membranes b. the role vitamin A plays in vision
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c. the role vitamin A plays in cell differentiation d. the role vitamin A plays in immunity e. the role vitamin A plays in sperm development status: incorrect (0.0) correct: c your answer: a feedback: Incorrect. While this is a concern, there is another effect that is of greater concern. (pg. 372) 5 Which of these is the easiest way to achieve vitamin A toxicity? a. overconsume potatoes b. overconsume beets c. overconsume carrots d. overconsume polar bear liver e. overconsume polar bear adrenal glands status: incorrect (0.0) correct: d your answer: a feedback: Incorrect. Potatoes offer very little vitamin A activity. (pg. 373) 6 Which of these vitamins is NOT necessarily an essential nutrient? a. vitamin K b. vitamin A c. folate d. vitamin E e. vitamin D status: incorrect (0.0) correct: e your answer: a feedback: Incorrect. Vitamin K must be obtained from dietary sources. (pg. 383) 7 Which structures are involved in the body's synthesis of vitamin D? a.
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This note was uploaded on 11/21/2011 for the course PUBH 1517 taught by Professor Paula.goldberg during the Winter '11 term at Life Chiropractic College West.

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PUBH 1517 Basic - How many forms of vitamin A are active in the body a b two c five d three e 1 four one status incorrect(0.0 correct d your answer

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