ATI RN
Pediatric Immunity NCLEX Questions Questions
Question 1 of 5
Cellular interactions between B and T cells involve costimulatory activation. There is a physical interaction between ___ on the B cell and ___ on the T cell. This leads to a B cell producing high affinity antibody.
Correct Answer: C
Rationale: CD40 (B cell) and CD154 (T cell) interaction is critical for B-cell activation and antibody affinity maturation.
Question 2 of 5
Mucociliary escalator
Correct Answer: B
Rationale: The mucociliary escalator in the upper respiratory tract clears pathogens.
Question 3 of 5
Which complement pathway is activated by (and requires) antibodies, with IgM being particularly good at C1 binding?
Correct Answer: B
Rationale: The classical pathway requires antibodies, with IgM effectively binding C1.
Question 4 of 5
Follows concentration gradient of chemokines to the site of infection
Correct Answer: B
Rationale: Chemotaxis is the movement along chemokine gradients.
Question 5 of 5
Most cases of septic shock are caused by gram organisms with the acting as the endotoxin in the disease.
Correct Answer: B
Rationale: Gram-negative bacteria are the most common cause of septic shock, and their lipopolysaccharide (LPS) endotoxin triggers the inflammatory response.