ATI RN
Lymphatic and Immune System Test Questions Questions
Question 1 of 5
Which of the following cell types is responsible for the cell-mediated immune response?
Correct Answer: A
Rationale: T cells drive cell-mediated immunity, targeting infected or cancerous cells, unlike B cells (humoral), leukocytes (general), or NK cells (innate).
Question 2 of 5
The definition, 'Innate and adaptive immune cell secreted protein that act as signalling molecules in an immune response' corresponds to?
Correct Answer: B
Rationale: Cytokines are signaling proteins secreted by immune cells, unlike surfactants, AMPs (kill pathogens), or lysozymes (enzymes).
Question 3 of 5
How does the concept of affinity differ from avidity?
Correct Answer: A
Rationale: Affinity is single-site binding strength; avidity is the cumulative strength of multiple sites.
Question 4 of 5
CD8+ T cell activation requires CD4+ T cell help because
Correct Answer: A
Rationale: CD4+ help (via cytokines like IL-2) regulates CD8+ activation, preventing excessive cytotoxicity.
Question 5 of 5
All of the following are true about antibodies, EXCEPT which one?
Correct Answer: B
Rationale: Antibodies are glycoproteins , fix complement , and are on B-cells ; they vary in sequence due to diversity.