Red Blood Cells Structure and Functions Quiz
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Questions and Answers

What is the diameter of a red blood cell?

  • 90 to 95 µm2
  • 2.5 µm
  • 1 µm
  • 7.8 µm (correct)
  • What is the normal range of red blood cell count in adult males?

  • 4.2-5.4 millions/µl
  • 2.5 millions/µl
  • 4.6-6.2 millions/µl (correct)
  • 7.8 millions/µl
  • What creates the unique shape of red blood cells?

  • Cell nucleus
  • Cytoskeleton (correct)
  • Plasma membrane
  • Hemoglobin
  • What is the thickness of a red blood cell at the thickest point?

    <p>2.5 µm</p> Signup and view all the answers

    What is the volume of a red blood cell?

    <p>90 to 95 µm2</p> Signup and view all the answers

    In which gender is the normal range of red blood cell count 4.2-5.4 millions/µl?

    <p>Adult females</p> Signup and view all the answers

    Which organelles are present in reticulocytes?

    <p>Golgi apparatus and mitochondria</p> Signup and view all the answers

    What stimulates the production of proerythroblasts from hematopoietic stem cells in the bone marrow?

    <p>Erythropoietin (EPO)</p> Signup and view all the answers

    What is the primary function of red blood cells?

    <p>Facilitate oxygen and carbon dioxide transport</p> Signup and view all the answers

    What vitamin is especially important for the maturation and rate of production of erythropoietic cells in the bone marrow?

    <p>Vitamin B12</p> Signup and view all the answers

    What does a lack of vitamin B12 or folic acid cause in the erythroblastic cells of the bone marrow?

    <p>Formation of larger than normal RBCs</p> Signup and view all the answers

    What is the iron-containing component that can combine reversibly with oxygen in a hemoglobin molecule?

    <p>Heme group</p> Signup and view all the answers

    Which form of carbon dioxide transport accounts for approximately 70% of total CO2 transport?

    <p>As bicarbonate ion</p> Signup and view all the answers

    What ratio can be used to monitor long term fluctuations of blood glucose levels?

    <p>$HbA1C$ ratio</p> Signup and view all the answers

    Which isoform of globin proteins is present in adult hemoglobin (hemoglobin A)?

    <p>$\alpha_2\beta_2$ chains</p> Signup and view all the answers

    Which region does carbonic anhydrase mainly target for the hydration of CO2?

    <p>The red blood cells</p> Signup and view all the answers

    What is the main component that accounts for over 98% of oxygen binding in red blood cells?

    <p>Heme group</p> Signup and view all the answers

    What is measured to calculate the oxy/deoxyhemoglobin ratio in pulse oximetry?

    <p>Absorption of red and infrared light</p> Signup and view all the answers

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