Chapter 07: Vitamins Nix: Williams' Basic Nutrition and Diet Therapy, 15th Edition

TEST BANK FOR WILLIAMS' BASIC NUTRITION AND DIET THERAPY 15TH EDITION BY NIX
Chapter 07: Vitamins
Chapter 07: Vitamins
Nix: Williams' Basic Nutrition and Diet Therapy, 15th Edition


MULTIPLE CHOICE

1. For a compound to be classified as a vitamin, it must
a. be synthesized by the body.
b. be required in large quantities.
c. perform a vital function.
d. be water soluble.

ANS: C
For a compound to be defined as a vitamin, it must be a vital, organic, dietary substance that is
not a carbohydrate, fat, protein, or mineral and is necessary in only very small amounts to
perform a specific metabolic function or prevent an associated deficiency. It also cannot be
manufactured by the body in sufficient amounts to sustain life and must be supplemented by
the body.

DIF: Cognitive Level: Comprehension REF: p. 85 TOP: Nursing Process: Planning
MSC: NCLEX: Physiological Integrity: Physiological Adaptation

2. A vitamin that behaves more like a hormone than a vitamin is vitamin
a. A.
b. D.
c. E.
d. K.
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ANS: B
Vitamin D is a prohormone made in the skin by sunlight.

DIF: Cognitive Level: Knowledge REF: p. 87 TOP: Nursing Process: Planning
MSC: NCLEX: Physiological Integrity: Physiological Adaptation

3. The provitamin form of vitamin A that is found in plant pigments is
a. beta-carotene.
b. chlorophyll.
c. beta-xanthophyll.
d. calciferol.

ANS: A
Beta-carotene is the provitamin form of vitamin A found in plant pigments. The body converts
it to vitamin A, making it a primary source of the vitamin.

DIF: Cognitive Level: Knowledge REF: p. 86 TOP: Nursing Process: Planning
MSC: NCLEX: Physiological Integrity: Physiological Adaptation

4. Spinach, carrots, and sweet potatoes are good sources of
a. beta-carotene.
b. vitamin A.
c. vitamin D.
d. vitamin E.




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, TEST BANK FOR WILLIAMS' BASIC NUTRITION AND DIET THERAPY 15TH EDITION BY NIX


ANS: A
Carotene is the group name of three red and yellow pigments (alpha-, beta-, and
gamma-carotene) found in dark-green and yellow vegetables and some fruits. The body
converts beta-carotene to vitamin A.

DIF: Cognitive Level: Application REF: pp. 87-88 TOP: Nursing Process: Planning
MSC: NCLEX: Physiological Integrity: Physiological Adaptation

5. Liver is a rich source of
a. vitamin A (retinol).
b. vitamin C.
c. vitamin D.
d. vitamin E.

ANS: A
Liver is a rich source of preformed, natural vitamin A. Other sources include fish liver oils,
egg yolk, butter, and cream.

DIF: Cognitive Level: Application REF: pp. 87-88 TOP: Nursing Process: Planning
MSC: NCLEX: Physiological Integrity: Physiological Adaptation

6. An important function of vitamin A is to
a. be incorporated into the bile.
b. help with blood clotting.
c. act as an antioxidant.
d. help form rhodopsin in the eye.

ANS: D NURSINGTB.COM
Vitamin A helps form the visual pigment rhodopsin in the eye. Retinol, the name given to
vitamin A, is an essential part of rhodopsin, commonly known as visual purple. This
light-sensitive substance enables the eye to adjust to the different amounts of available light.

DIF: Cognitive Level: Knowledge REF: p. 85 TOP: Nursing Process: Planning
MSC: NCLEX: Physiological Integrity: Physiological Adaptation

7. A deficiency of vitamin A may result in
a. osteoporosis.
b. bile obstruction.
c. breakdown of cell membranes.
d. night blindness.

ANS: D
Night blindness results from a deficiency of vitamin A. Vitamin A helps form the visual
pigment rhodopsin in the eye. Retinol, the name given to vitamin A, is an essential part of
rhodopsin, commonly known as visual purple. This light-sensitive substance enables the eye
to adjust to the different amounts of available light.

DIF: Cognitive Level: Knowledge REF: p. 85 TOP: Nursing Process: Planning
MSC: NCLEX: Physiological Integrity: Physiological Adaptation

8. Fish liver oils are a good source of




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