ATI RN
Immune System Questions Questions
Question 1 of 5
Which of the following immune cells/molecules are most effective at destroying intracellular pathogens?
Correct Answer: D
Rationale: T cytolytic cells (Tc cells) and Natural killer cells kill infected host cells which are harbouring intracellular pathogens, unlike antibodies or B cells (extracellular focus).
Question 2 of 5
Which of the following actually kills invading microbes?
Correct Answer: D
Rationale: Lysozymes degrade bacterial walls, stomach acid kills via pH, and intestinal enzymes digest microbes; all kill invaders.
Question 3 of 5
Cytotoxic T cells are called into action by the:
Correct Answer: B
Rationale: IL-2 activates cytotoxic T cells; IL-1 is broader, neutrophils are innate.
Question 4 of 5
Which of the following does not occur during the lag period of the primary antibody response?
Correct Answer: B
Rationale: Class switching occurs later; activation , presentation , and binding happen in lag.
Question 5 of 5
The ability of T-lymphocytes to recognize self from non-self antigens is developed in the
Correct Answer: C
Rationale: T cells gain self/non-self recognition during maturation in the thymus via positive and negative selection.