USMLE Exam Prep

Category - Free USMLE Practice Test Questions

A decrease in which of the following is most directly related to the immunological failure?
  1. antibody activity
  2. cytotoxic T-cell function
  3. mast cell degranulation
  4. platelet aggregation
Explanation
Answer: A - A deficiency in immunoglobulin production or activity is directly related to susceptibility to common extracellular microbes such as streptococci.
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