Iron Mineral Distribution and RDA Quiz
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Questions and Answers

Where is iron predominantly found in the body?

  • Blood and bone marrow
  • Leafy vegetables and cereals
  • Liver, bone marrow, and muscle (correct)
  • Liver and meat cooking in iron utensils

    • Which form of iron is absorbed in the body?

  • Heme iron
  • Ferric (Fe+++)
  • Oxidized iron
  • Ferrous (Fe++) (correct)

    • What factor increases the absorption of iron?

  • Ascorbic acid (correct)
  • Phytic acid
  • Oxalic acid
  • Tea and coffee

    • Which of the following inhibits the absorption of iron?

    <p>Calcium</p> Signup and view all the answers

    Where is iron absorbed from in the body?

    <p>Duodenum and jejunum</p> Signup and view all the answers

    How is iron regulated at the absorption level?

    <p>It is regulated at the absorption level, not at excretion</p> Signup and view all the answers

    What substance is responsible for converting ferric iron into ferrous form in the intestinal lumen?

    <p>Glutathione</p> Signup and view all the answers

    Which protein binds iron in the lumen and transports it into the mucosal cell?

    <p>Divalent metal transporter-1 (DMT-1)</p> Signup and view all the answers

    What is the temporary storage form of iron in the mucosal cell?

    <p>Ferritin</p> Signup and view all the answers

    Which protein converts ferrous iron to ferric form in the plasma?

    <p>Ceruloplasmin</p> Signup and view all the answers

    According to the mucosal block theory, how is iron absorption regulated?

    <p>Increased when adequate iron is stored</p> Signup and view all the answers

    What signals the mucosal cell to increase iron absorption when storage iron is decreased?

    <p>Erythropoietin</p> Signup and view all the answers

    At what level does iron uptake by cells take place when iron concentration is high?

    <p>Translation level</p> Signup and view all the answers

    How is transferrin formed in the blood?

    <p>By action of ferroxidase-I</p> Signup and view all the answers

    What does transferrin transport to various tissues and organs?

    <p>Ferric iron</p> Signup and view all the answers

    What binds two transferrin molecules in cells?

    <p>Transferrin receptor</p> Signup and view all the answers

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