ATI RN
Chapter 20 The Lymphatic System and Immunity Sample Questions Questions
Question 1 of 5
The development of holes in bacterial plasma membranes is caused by
Correct Answer: B
Rationale: Complement proteins form pores (MAC) in bacterial membranes.
Question 2 of 5
Which lymphatic organ's major job is to destroy worn-out red blood cells and return some of the products to the liver:
Correct Answer: B
Rationale: Spleen destroys old RBCs and recycles products; tonsils protect the throat, thymus matures T cells, appendix and Peyer's are immune-related but not RBC-focused.
Question 3 of 5
Peripheral tolerance is maintained by all of the following mechanisms except
Correct Answer: B
Rationale: Thymus deletion is central, not peripheral; anergy , clonal deletion , and Tregs are peripheral.
Question 4 of 5
The class or subclass of an immunoglobulin is determined by the:
Correct Answer: A
Rationale: CH region determines Ig class; CL is light chain, VH and VL are variable.
Question 5 of 5
In the above question, resolution of parasitic infections of the gastrointestinal tract is dependent upon the activation of:
Correct Answer: D
Rationale: Th2 cells drive IgE via IL-4/IL-13 for parasites; Th1 is antiviral, not IgG or cytotoxic .