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Author Question: A patient develops an immunoglobulin G (IgG) antibody that causes red cells to be destroyed by the ... (Read 60 times)

xclash

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on: Jun 25, 2018
A patient develops an immunoglobulin G (IgG) antibody that causes red cells to be destroyed by the spleen. This is what type of hemolysis?
 
  a. Inherited, intrinsic, extravascular, immune
  b. Acquired, extrinsic, extravascular, immune
  c. Acquired, intrinsic, intravascular, immune
  d. Acquired, extrinsic, intravascular, traumatic

Question 2

What surface antigen on cells identifies them as a hematopoietic stem cell?
 
  a. CD8
  b. CD34
  c. CD55
  d. CD59


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pallen55

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
Because the patient develops the antibody, this is acquired, not inherited. The antibody is found in plasma, so it is extrinsic to the red cell. Destruction in the spleen is extravascular because it occurs outside the circulation. It is immune because an antibody causes it.

Answer to Question 2

ANS: B
Hematopoietic stem cells are identified by the presence of CD34 on their surface. These are decreased in aplastic anemia.


xclash

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Reply 2 on: Jun 25, 2018
Wow, this really help

nguyenhoanhat

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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