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Kaplan Qbank USMLE



Author5 Posts
  #1

A 74 year old male presents to your general practice, complaining that he catches every bug that comes along. You thumb through his medical file and find a 4 year history of recurrent and chronic illness. Your pt insists that he complies with all instructions on the medications given for his various ailments. You decide to take a small risk and prescribe cimetidine as an immunostimulant. Which of the following describes the immuno-stimulatory effect of cimetidine?

A cimetidine blocks h2 receptors on b cells, diminishing the humoral response, thus increasing cellular immunity
B cimetidine blocks h2 receptors on b cells, decreasing their cAMP levels, increasing their activity.
C cimetidine blocks h2 receptors on t cells, decreasing their cAMP levels, increasing their activity.
D cimetidine stimulates h1 receptors on t cells, increasing their cAMP, increasing their activity.
E cimetidine stimulates h1 receptors on b cells, increasing their cAMP, increasing their activity.

  #2

C?

  #3

nod

  #4

Why T cell, not B cell?

Pls explain.


  #5

B cell dont hav H1







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