ATI RN
Lymphatic System and Immunity Test Questions Questions
Question 1 of 5
The adaptive immune system is capable of mounting specific responses to particular microorganisms because
Correct Answer: C
Rationale: Adaptive immunity relies on a vast lymphocyte repertoire, each specific to a unique antigen, not changing specificity or stem cell-driven receptors.
Question 2 of 5
Leukocyte secreted cytokines, which act on leukocytes, are known as.
Correct Answer: D
Rationale: Interleukins are cytokines acting between leukocytes, a broad term encompassing lymphokines (lymphocyte-derived) and others.
Question 3 of 5
Complete the following sentence. The antibody isotype which displays the highest avidity due to its pentameric form, and is capable of complement recruitment corresponds to.....
Correct Answer: D
Rationale: IgM's pentameric structure gives high avidity and activates complement efficiently.
Question 4 of 5
Which of the following cytokines are mainly secreted by CD4 T helper 2 cells
Correct Answer: C
Rationale: Th2 cells secrete IL-4, IL-5, and IL-13, promoting humoral immunity and allergies, unlike Th1 (IL-2, TNF) or Th17 (IL-17) profiles.
Question 5 of 5
The major immunoglobulin family to which a particular immunoglobulin belongs can be determined by sequential analysis of the 110 amino acids beginning from the
Correct Answer: C
Rationale: Heavy chain constant region (C-terminus, C) defines isotype; variable regions (A, B) or light chain don't.