ATI RN
Lymphatic System Questions Questions
Question 1 of 5
A primary immune response is
Correct Answer: C
Rationale: The primary immune response occurs upon first antigen exposure, activating lymphocytes, not memory cells (secondary response).
Question 2 of 5
An example of a cytokine produced by activated macrophages with a major role on the innate immune response is:
Correct Answer: B
Rationale: TNF (tumor necrosis factor) from macrophages drives innate inflammation, unlike IL-2 (T cell growth), IL-4 (Th2), or IL-17 (Th17).
Question 3 of 5
The antibody isotype that provides immunity against helminths and is capable of sensitising mast cells resulting in the induction of an allergic response is
Correct Answer: B
Rationale: IgE targets helminths and triggers mast cell degranulation in allergies.
Question 4 of 5
Which of these statements correctly describe the function of CTLA-4
Correct Answer: B
Rationale: CTLA-4 on activated T cells binds B7 with higher affinity than CD28, inhibiting T cell activation.
Question 5 of 5
All of the following are true EXCEPT
Correct Answer: A
Rationale: Paratope is the antibody site, not epitope ; epitope , IgG bivalence , and heavy chain class are true.