ATI RN
Lymphatic and Immune System Test Questions Questions
Question 1 of 5
Neurons are
Correct Answer: D
Rationale: Neurons are signal-carrying cells, the functional units of the nervous system, and consist of a cell body, dendrites, and axons. All options are correct.
Question 2 of 5
Which of the following diseases is thought to be an autoimmune disease?
Correct Answer: B
Rationale: Insulin-dependent diabetes (Type 1) is autoimmune, attacking pancreatic cells, unlike cancer, viral infections (measles/mumps), or ulcers.
Question 3 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 4 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 5 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.