Blood Cells
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Questions and Answers

What is the normal range of red blood cells (RBC) in men?

  • 2.5-4.5 x 10^6/mcl
  • 3.0-5.0 x 10^6/mcl
  • 4.2-6.1 x 10^6/mcl (correct)
  • 5.5-7.5 x 10^6/mcl

    • What is the primary responsibility of erythrocytes (RBC)?

  • Maintaining blood pH balance
  • Storing iron for the body
  • Carrying and transporting oxygen (correct)
  • Producing antibodies

    • What is the molecule responsible for carrying gases and electrolytes in erythrocytes (RBC)?

  • Ferritin
  • Hematocrit
  • Myoglobin
  • Hemoglobin (correct)

    • What percentage of total body iron is stored in macrophages?

    <p>About 30%</p> Signup and view all the answers

    What is the life cycle of erythrocytes (RBC) primarily limited by?

    <p>Inability to go through mitosis</p> Signup and view all the answers

    What is the primary function of heme in red blood cells?

    <p>Carrying oxygen</p> Signup and view all the answers

    Which molecule is involved in protecting red blood cells against oxidative stress?

    <p>G6PD</p> Signup and view all the answers

    What regulates the balance between production and destruction of red blood cells?

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

    What happens to the heme and globin when old red blood cells are destroyed?

    <p>The heme is metabolized into bilirubin, while globin is broken down into amino acids</p> Signup and view all the answers

    What is the major iron storage protein?

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

    What carries iron for hemoglobin production to the bone marrow?

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

    Which enzyme deficiency can result in damage and death to red blood cells?

    <p>Pyruvate kinase</p> Signup and view all the answers

    What is the normal range for hemoglobin in grams per deciliter?

    <p>12-18 g/dL</p> Signup and view all the answers

    What is the primary role of the biconcavity and reversible deformity of erythrocytes (RBC)?

    <p>To optimize surface area for gas diffusion</p> Signup and view all the answers

    Which molecule competitively binds to heme in red blood cells with an affinity 200-300 times greater than oxygen?

    <p>Carbon monoxide (CO)</p> Signup and view all the answers

    What is the main energy source for red blood cells, given their lack of mitochondria?

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

    Which enzyme deficiency can lead to damage and death of red blood cells?

    <p>Glucose-6-phosphate dehydrogenase (G6PD) deficiency</p> Signup and view all the answers

    What is the primary function of transferrin in the bloodstream?

    <p>Carries iron for hemoglobin production to the bone marrow</p> Signup and view all the answers

    What is the primary function of ferritin in iron metabolism?

    <p>Store excess iron in macrophages</p> Signup and view all the answers

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