Blood Chapter 19 Quiz: Blood Types and Transfusions
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Questions and Answers

What is the average life span of a red blood cell?

  • 1 month
  • 4 months (correct)
  • 24 hours
  • about 1 year
  • If a strict vegan develops anemia due to a nutritional deficiency, what is the most likely candidate?

  • Aplastic anemia
  • Iron-deficiency anemia (correct)
  • Vitamin K deficiency
  • Sickle cell anemia
  • In adults, where is the primary site of white blood cell formation?

  • Liver
  • Thymus
  • Red bone marrow (correct)
  • Spleen
  • Each heme ring in hemoglobin encloses an atom of what element?

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

    What is the likely cause of aplastic anemia?

    <p>Bone marrow damage</p> Signup and view all the answers

    Which pathway of coagulation is initiated by the activation of Factor VII exposed to collagen?

    <p>Extrinsic pathway</p> Signup and view all the answers

    In the intrinsic pathway of coagulation, what activates Factor XII?

    <p>Activation by platelet factors</p> Signup and view all the answers

    What marks the beginning of the common pathway of coagulation?

    <p>Activation of a proenzyme exposed to collagen</p> Signup and view all the answers

    Which process specifically dissolves clots?

    <p>Forms emboli</p> Signup and view all the answers

    What causes the release of tissue factor (Factor III) by damaged endothelium in coagulation?

    <p>Activation of Factor VII exposed to collagen</p> Signup and view all the answers

    What is the likely consequence of an obstruction in blood flow to the kidneys?

    <p>Increased erythropoiesis</p> Signup and view all the answers

    If Mary's hemoglobin level is 16 g/dL, what can be concluded about her health status?

    <p>Her hemoglobin level is normal</p> Signup and view all the answers

    Why might the surgical removal of the stomach cause pernicious anemia?

    <p>Thrombocytopenia could develop</p> Signup and view all the answers

    Which condition could lead to a rise in erythropoietin levels in the blood?

    <p>Increased sensitivity to vitamin K</p> Signup and view all the answers

    Why might there be insufficient heme in the hemoglobin?

    <p>A gene for adult hemoglobin is abnormal</p> Signup and view all the answers

    Why are people with type AB blood considered the universal recipient for transfusions?

    <p>Their blood lacks A or B agglutinins.</p> Signup and view all the answers

    What is a characteristic of type AB blood?

    <p>RBCs have both the A &amp; B surface antigens and no ABO plasma antibodies.</p> Signup and view all the answers

    In whose blood are Anti-D antibodies present?

    <p>Rh negative individuals who have been exposed to the D surface antigen.</p> Signup and view all the answers

    What happens when an Rh negative individual is exposed to the D surface antigen?

    <p>They develop Anti-D antibodies in their blood.</p> Signup and view all the answers

    Which blood type can be considered the universal donor?

    <p>Type O negative</p> Signup and view all the answers

    What is a risk of mismatched blood transfusions?

    <p>Hemolysis, or the breakdown of red blood cells</p> Signup and view all the answers

    What is the main function of erythropoietin in the context of anemia?

    <p>Encouraging the production of red blood cells</p> Signup and view all the answers

    Why can damaged kidneys lead to anemia in patients?

    <p>They produce less erythropoietin, reducing red blood cell production</p> Signup and view all the answers

    Which component is responsible for preventing erythroblastosis fetalis in Rh-negative mothers?

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

    What is the mechanism by which Rhogam prevents hemolytic disease of the newborn?

    <p>Agglutinating fetal red cells in the newborn</p> Signup and view all the answers

    In patients with advanced kidney disease, what happens to erythropoietin?

    <p>It is lost through urine due to kidney damage</p> Signup and view all the answers

    Why is synthetic erythropoietin injected into kidney patients?

    <p>To compensate for decreased endogenous erythropoietin production</p> Signup and view all the answers

    Study Notes

    Life Span and Cell Formation

    • The average lifespan of a red blood cell is approximately 120 days.
    • Adults primarily form white blood cells in the bone marrow.

    Nutritional Deficiency and Anemia

    • A strict vegan is most likely to develop anemia due to a deficiency in vitamin B12.
    • Surgical removal of the stomach can lead to pernicious anemia because intrinsic factor, necessary for B12 absorption, is produced in the stomach.

    Hemoglobin and Coagulation

    • Each heme ring in hemoglobin contains an iron (Fe) atom.
    • The intrinsic pathway of coagulation is initiated when Factor XII is activated by contact with negatively charged surfaces, such as collagen.
    • The common pathway of coagulation begins with the activation of Factor X.

    Coagulation Mechanisms

    • Tissue factor (Factor III) is released by damaged endothelium in response to injury.
    • Fibrinolysis is the process that specifically dissolves clots.
    • An obstruction in blood flow to the kidneys can lead to acute kidney injury and renal failure.

    Blood Characteristics and Transfusions

    • A hemoglobin level of 16 g/dL suggests that Mary is likely healthy, as normal levels range from 12 to 16 g/dL for women and 13.5 to 17.5 g/dL for men.
    • Insufficient heme in hemoglobin can occur due to iron deficiency.
    • Blood type AB individuals are considered universal recipients because they lack anti-A and anti-B antibodies.

    Blood Type Antibodies

    • Anti-D antibodies are present in Rh-negative individuals if they have been previously sensitized to Rh-positive blood.
    • When an Rh-negative individual is exposed to the D antigen, they may develop an immune response that can cause complications in future pregnancies if they conceive an Rh-positive child.

    Blood Donation and Risks

    • Type O-negative blood is the universal donor, as it lacks A, B, and D antigens.
    • Mismatched blood transfusions can cause acute hemolytic reactions, which are potentially life-threatening.

    Erythropoietin and Kidney Function

    • Erythropoietin primarily stimulates red blood cell production in the bone marrow, especially during anemia.
    • Damaged kidneys can lead to anemia due to a reduced ability to produce erythropoietin.
    • In patients with advanced kidney disease, erythropoietin production is often decreased, leading to further anemia.

    Preventing Hemolytic Disease

    • Rhogam (Rho(D) immune globulin) prevents erythroblastosis fetalis in Rh-negative mothers by suppressing the immune response to Rh-positive cells.
    • Rhogam works by providing passive immunity, preventing the mother's immune system from recognizing and attacking Rh-positive fetal red blood cells.

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    Description

    Test your knowledge on blood types and transfusions by answering multiple-choice questions related to blood compatibility. Explore why people with type AB blood are considered universal recipients for transfusions, and understand the underlying principles of blood agglutinins.

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