Packed Cell Volume (Hematocrit) Quiz
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Questions and Answers

What is the Packed Cell Volume (P.C.V) a measure of?

  • The volume of the platelets in the blood
  • The volume of the red blood cells in the blood (correct)
  • The volume of the plasma in the blood
  • The volume of the white blood cells in the blood

    • In healthy men, what is the average number of red blood cells per cubic millimeter?

  • 4,500,000 (±300,000)
  • 4,700,000 (±300,000)
  • 5,500,000 (±300,000)
  • 5,200,000 (±300,000) (correct)

    • What is the life span of red blood cells?

  • 150 days
  • 90 days
  • 60 days
  • 120 days (correct)

    • Where are red blood cells derived from?

    <p>Bone marrow (D)</p> Signup and view all the answers

    What causes growth induction and greatly increased production of erythrocytes?

    <p>Exposure to low oxygen levels (D)</p> Signup and view all the answers

    What is the main part of blood that constitutes about 55% of the blood volume?

    <p>Plasma (C)</p> Signup and view all the answers

    What is the normal range of P.C.V for adult male?

    <p>47 ± 7% (C)</p> Signup and view all the answers

    What condition is characterized by an increase in the volume of P.C.V above the reference range?

    <p>Polycythemia (A)</p> Signup and view all the answers

    Which condition is associated with an increase in the volume of P.C.V?

    <p>Polycythemia Vera (A)</p> Signup and view all the answers

    What results from vitamin B12 & folic acid deficiency?

    <p>Megaloblastic Anemia (A)</p> Signup and view all the answers

    What type of anemia is characterized by RBCs that are smaller than normal and have too little hemoglobin inside them?

    <p>Blood Loss Anemia (A)</p> Signup and view all the answers

    What causes primary polycythemias?

    <p>Acquired genetic mutations (D)</p> Signup and view all the answers

    Which condition can lead to secondary polycythemia?

    <p>Chronic hypoxia (A)</p> Signup and view all the answers

    What is the term for the decrease in the volume of P.C.V below normal?

    <p>Anemia (D)</p> Signup and view all the answers

    What type of anemia is characterized by hereditary disorders that make the cells fragile, so they rupture easily as they go through the capillaries?

    <p>Hereditary spherocytosis (B)</p> Signup and view all the answers

    Which condition can cause an increase in hematocrit, hemoglobin, or RBC?

    <p>High Altitude (B)</p> Signup and view all the answers

    The plasma constitutes about 45% of the blood volume.

    <p>False (B)</p> Signup and view all the answers

    The life span of red blood cells is approximately 90 days.

    <p>False (B)</p> Signup and view all the answers

    An increase in the volume of P.C.V is associated with a decrease in the number of red blood cells.

    <p>False (B)</p> Signup and view all the answers

    RBCs are derived from pluripotential hematopoietic stem cells in the liver.

    <p>False (B)</p> Signup and view all the answers

    Primary polycythemias are caused by vitamin B12 and folic acid deficiency.

    <p>False (B)</p> Signup and view all the answers

    The term for the decrease in the volume of P.C.V below normal is secondary polycythemia.

    <p>False (B)</p> Signup and view all the answers

    An increase in the volume of P.C.V above the reference range is known as anemia.

    <p>False (B)</p> Signup and view all the answers

    Megaloblastic Anemia results from vitamin B12 & folic acid deficiency, causing red blood cells to grow too large with different shapes.

    <p>True (A)</p> Signup and view all the answers

    Polycythemia is a condition that results in a decreased level of circulating red blood cells in the bloodstream.

    <p>False (B)</p> Signup and view all the answers

    Aplastic Anemia is caused by too few red blood cells or too little hemoglobin in the cells.

    <p>False (B)</p> Signup and view all the answers

    Hematocrit (P.C.V) value increases in conditions associated with hypoxia.

    <p>True (A)</p> Signup and view all the answers

    Glucose-6-phosphate dehydrogenase (G6PD) is a type of Megaloblastic Anemia.

    <p>False (B)</p> Signup and view all the answers

    Hemolytic Anemia can be caused by hereditary disorders that make the red blood cells fragile and easily ruptured as they go through the capillaries.

    <p>True (A)</p> Signup and view all the answers

    An increase in the volume of P.C.V above the reference range is termed as anemia.

    <p>False (B)</p> Signup and view all the answers

    Anemia means a deficiency of white blood cells in the blood.

    <p>False (B)</p> Signup and view all the answers

    Primary polycythemias are due to increased erythropoietin (EPO) production either in response to chronic hypoxia or from an erythropoietin-secreting tumor.

    <p>False (B)</p> Signup and view all the answers

    What is the normal range of P.C.V for adult male?

    <p>42-52%</p> Signup and view all the answers

    What is the life span of red blood cells?

    <p>120 days</p> Signup and view all the answers

    What is the main part of blood that constitutes about 55% of the blood volume?

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

    Where are red blood cells derived from?

    <p>bone marrow</p> Signup and view all the answers

    What causes growth induction and greatly increased production of erythrocytes?

    <p>exposure of the blood to low oxygen for a long time</p> Signup and view all the answers

    What is the term for the decrease in the volume of P.C.V below normal?

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

    What is the normal range of P.C.V for adult male?

    <p>47 ± 7%</p> Signup and view all the answers

    What condition results in an increased level of circulating red blood cells in the bloodstream?

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

    What type of anemia is characterized by RBCs that are smaller than normal and have too little hemoglobin inside them?

    <p>Microcytic hypochromic anemia</p> Signup and view all the answers

    What causes Megaloblastic Anemia?

    <p>Vitamin B12 &amp; folic acid deficiency</p> Signup and view all the answers

    What is the term for the decrease in the volume of P.C.V below normal?

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

    What is the average number of red blood cells per cubic millimeter in healthy men?

    <p>Approximately 5.2 million per cubic millimeter</p> Signup and view all the answers

    What is the term for a condition that results in an increased level of circulating red blood cells in the bloodstream, characterized by an increase in hematocrit, hemoglobin, or RBC?

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

    What is the life span of red blood cells?

    <p>Approximately 90 days</p> Signup and view all the answers

    What type of anemia is characterized by hereditary disorders that make the cells fragile, so they rupture easily as they go through the capillaries?

    <p>Hemolytic Anemia</p> Signup and view all the answers

    What type of anemia results from vitamin B12 & folic acid deficiency, causing red blood cells to grow too large with different shapes?

    <p>Megaloblastic Anemia</p> Signup and view all the answers

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