Iron Metabolism Lecture#6 Summary for Medical Students
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Questions and Answers

What is the main way in which iron balance is achieved in the body?

  • By controlling excretion
  • By increasing iron levels in the diet
  • By controlling absorption (correct)
  • By promoting iron excretion through urine
  • How is iron lost from the body?

  • When iron-laden cells, especially gastrointestinal cells, are lost (correct)
  • By decreasing iron absorption
  • Through active excretion
  • Through urine
  • Which iron-containing compound is responsible for intracellular iron storage?

  • Transferrin
  • Ferritin (correct)
  • Hemoglobin
  • Myoglobin
  • What is the function of myoglobin in the body?

    <p>Oxygen storage in muscles</p> Signup and view all the answers

    What is the dietary requirement of iron for menstruating women?

    <p>18 mg/day</p> Signup and view all the answers

    Which enzyme is involved in heme biosynthesis?

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

    Why is the absorption of dietary iron subject to regulation unlike other electrolytes?

    <p>Iron balance is achieved by control of absorption rather than excretion</p> Signup and view all the answers

    What happens to iron-laden cells in the body when iron is lost?

    <p>They contribute to iron balance</p> Signup and view all the answers

    Which age group has the highest total body iron endowment per kilogram of body weight?

    <p>Newborn infants</p> Signup and view all the answers

    What percentage of total iron in the body is stored in the form of hemoglobin?

    <p>65%</p> Signup and view all the answers

    Which iron-containing compound is responsible for plasma iron transport?

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

    What is the daily dietary requirement of iron for pregnant and lactating women?

    <p>40 mg/day</p> Signup and view all the answers

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