ATI RN
Good Questions About the Immune System Questions
Question 1 of 5
Which of the following immunoglobulin is the primary host defense against parasitic infections?
Correct Answer: D
Rationale: IgE defends against parasites via eosinophil activation; IgA is mucosal.
Question 2 of 5
The specificity of an antibody is due to
Correct Answer: D
Rationale: The variable portion of heavy and light chain determines specificity by forming the antigen-binding site, unlike the Fc portion (effector function).
Question 3 of 5
Polymorphonuclear neutrophils attack bacteria:
Correct Answer: A
Rationale: Neutrophils primarily phagocytose bacteria, using both oxygen-dependent and independent mechanisms.
Question 4 of 5
The immunoglobulin found in a mother's milk is
Correct Answer: B
Rationale: IgA is predominant in milk for mucosal protection; IgG is in blood, IgM and IgE are less relevant.
Question 5 of 5
Hypersensitivity reactions:
Correct Answer: D
Rationale: All (A, B, C) are true: IgE (Type I), complexes (Type III), and complement/IgG (Type II); thus, D.