ATI RN
Lymphatic System Quiz Questions Questions
Question 1 of 5
What substance, produced by virus-infected cells, diffuses to neighboring cells to help them fight a viral infection?
Correct Answer: B
Rationale: Interferon is produced by virus-infected cells and signals nearby cells to enhance antiviral defenses, unlike lysozyme (antibacterial), histamine (inflammation), or interleukin-2 (immune activation).
Question 2 of 5
Which of the following innate immune response statements is false?
Correct Answer: B
Rationale: Innate immunity is rapid and nonspecific, involving receptors and phagocytosis, but does not produce specific antibodies or memory, which are adaptive immunity features.
Question 3 of 5
Which of the statements below is a consequence of MHC1 antigen presentation?
Correct Answer: A
Rationale: MHC1 presents to CD8+ T cells, activating them against intracellular pathogens, not directly enhancing macrophages.
Question 4 of 5
During positive selection, a weak interaction between an immature T cell receptor and self MHC:
Correct Answer: A
Rationale: Weak TCR-MHC binding during positive selection ensures T cells can recognize self-MHC, surviving to mature.
Question 5 of 5
As a mechanism of attack against extracellular bacteria and fungi, Th17 cells mediate the recruitment and stimulation of which type of innate immune cell?
Correct Answer: D
Rationale: Th17 cells recruit neutrophils via IL-17 to combat extracellular pathogens.