Quiz 7 Key HUN 4221 Sp 11

Quiz 7 Key HUN 4221 Sp 11 - cellular export protein ATP7B...

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QUIZ 7 HUN 4221 Spring 2011 KEY Multiple Choice (2 points) 1. Male laboratory rats placed on a selenium-deficient diet were observed to develop muscle degeneration, inability to produce offspring, and enlarged thyroid glands. Select possible explanation(s) for these observations. (a) Selenium is required as an antioxidant to maintain muscle integrity (b) Sperm contain a selenium-containing protein as a structural component (c) Conversion of T4 to T3, the most biologically active form of thyroxine, is dependent on a selenium-containing enzyme (d) All of the above (e) None of the above 2. Correct statement(s) regarding the etiology (cause) of acrodermatitis enteropathica include the following. (a) Genetic defect leading to increased urinary loss of zinc (b) Impaired absorption of zinc due to mutation of Zip4 transporter (c) High doses of supplemental zinc are not effective in treatment (d) (e) All of the above 3. You are writing a section of a new nutrition book on copper. Select the correct statements that could be included.
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(a) Wilson’s disease results in a toxic build up of tissue copper due to mutation in
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Unformatted text preview: cellular export protein ATP7B (b) Ceruloplasmin is a protein that transports copper from the intestinal lumen into the enterocyte across the brush border membrane (c) Superoxide dismutase is a copper metalloenzyme that converts hydrogen peroxide to H2O (d) All of the above (e) None of the above True or False (1 point) 4. Beef has a higher concentration (mg/100g) of zinc than oysters. (a) True (b) False 5. A 2011 review of randomized controlled trials concluded that zinc supplements have been shown to reduce the severity and incidence of colds when taken for specified durations. (a) True (b) False 6. Glutathione peroxidase 1 is a selenium containing enzyme that functions to oxidize water to hydrogen peroxide. (a) True (b) False 7. A severe copper deficiency can result in connective tissue abnormalities affecting the skeletal and vascular systems due to impaired activity of lysyl oxidase. (a) True (b) False...
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This note was uploaded on 12/09/2011 for the course HUN 4445 taught by Professor Sitren during the Spring '08 term at University of Florida.

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Quiz 7 Key HUN 4221 Sp 11 - cellular export protein ATP7B...

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