ATI RN
Immune System Questions Questions
Question 1 of 5
What are PRRs and what do they recognize?
Correct Answer: B
Rationale: PRRs (pattern recognition receptors) recognize PAMPs and DAMPs as danger signals ; C is a subset, A and D are incorrect.
Question 2 of 5
Which immune system cell is the most abundant in the lamina propria?
Correct Answer: B
Rationale: T cells are most abundant in the lamina propria for mucosal immunity; B cells , macrophages , and neutrophils are less dominant.
Question 3 of 5
Which lymphatic area is larger in a child than an adult?
Correct Answer: C
Rationale: The thymus is larger in children, shrinking with age; spleen , nodes , and duct don't vary as significantly.
Question 4 of 5
Antibodies, complement proteins, and phagocytic cells provide effective protection against all of the following types of infections in Figure Q2.1, except:
Correct Answer: C
Rationale: Assuming Q2.1 lists infection types, intracellular pathogens (e.g., viruses) resist antibodies/complement/phagocytosis ; extracellular pathogens are cleared.
Question 5 of 5
Early studies analyzing the antibody protein fragments generated after proteolytic cleavage revealed important information about the overall structure of the antibody molecule. Which cleavage pattern (indicated by the red triangles in Figure Q4.5) yields a fragment that has the same antigen-binding avidity as the intact antibody, but is unable to activate complement after binding to a pathogen?
Correct Answer: B
Rationale: Assuming Q4.5 shows cleavages, Fab retains binding but lacks Fc for complement; exact pattern inferred.