Intro to Nutrition CH10 – Flashcards
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What is the primary chemical reaction in which thiamin participates as its coenzyme?
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Assists in removal of one carbon unit from compounds involved in energy metabolism
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Which of the following symptoms is indicative of a vitamin C deficiency?
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Subcutaneous pinpoint hemorrhages
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What is a precursor?
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A substance that is used to synthesize another compound
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A similar type of anemia is produced when there is a deficiency of either
a. riboflavin or niacin
b. vitamin B12 or folate
c. thiamin or riboflavin
d. vitamin B6 or vitamin B12
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b. vitamin B12 or folate
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All of the following are consequences of ingesting excess vitamin C supplements EXCEPT
a. diarrhea
b. appearing safe at levels up to 300 mg/day
c. enhancing the action of anticlotting medications
d. interfering with laboratory urine tests for the diagnosis of diabetes
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enhancing the action of anticlotting medications
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Which of the following activities is shared by vitamin B12 and folate?
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Both are required for nucleic acid synthesis.
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A general niacin deficiency can result in abnormalities of all of the following organs/systems EXCEPT
a. skin
b. skeletal
c. nervous system
d. gastrointestinal tract
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skeletal
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What is the primary excretory route for the water-soluble vitamins?
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Kidney
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Which of the following food groups is a rich source of vitamin C?
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Fruit group
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Why might vitamin C be beneficial in treating the common cold?
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It deactivates histamine.
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Riboflavin in its coenzyme form functions in the transfer of
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hydrogen atoms
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Which of the following functions has a requirement for thiamin?
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Energy release from energy-yielding nutrients
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Which of the following is an early sign of vitamin C deficiency?
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Bleeding gums
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What is meant by the bioavailability of a vitamin in food?
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The amount absorbed and subsequently used by the body
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What is the most likely reason for the development of a vitamin B12 deficiency?
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Inadequate absorption
