ATI RN
Good Questions About the Immune System Questions
Question 1 of 5
The most numerous and main cell in the inflammatory response is the
Correct Answer: B
Rationale: Neutrophils are the most abundant in acute inflammation; macrophages , monocytes , and basophils are less numerous.
Question 2 of 5
Individuals or mice with defects in the biochemical pathways needed for loading peptides onto MHC molecules show greatly increased susceptibility to virus infections. Experiments examining the MHC molecules present on the surface of host cells in these individuals would show:
Correct Answer: B
Rationale: Peptide loading defects (e.g., TAP) reduce MHC surface expression ; empty MHC or self-peptides are unstable.
Question 3 of 5
Kinds of innate immunity barriers are
Correct Answer: C
Rationale: Innate immunity includes both external barriers (skin, secretions, mucous membranes) and internal defenses (inflammatory response), making both A and B correct.
Question 4 of 5
The major result of the inflammatory response is to
Correct Answer: B
Rationale: Inflammation clears pathogens and starts tissue repair, a nonspecific process, unlike antibody production or cell-mediated responses (adaptive immunity).
Question 5 of 5
The basic function of activated T cells is to battle
Correct Answer: C
Rationale: Activated T cells (e.g., cytotoxic T cells) target intracellular pathogens, like viruses in infected cells, not extracellular pathogens or mediators.