ATI RN
Lymphatic System Exam Questions Questions
Question 1 of 5
microglial cell in
Correct Answer: C
Rationale: Microglial cells are macrophages in the central nervous system (CNS).
Question 2 of 5
Which protein is involved in the lectin activation pathway and is made in the liver?
Correct Answer: A
Rationale: MASP (mannose-binding lectin-associated serine protease) activates the lectin pathway and is liver-made ; MCP, DAF, CD59 regulate complement.
Question 3 of 5
What are NKT cells?
Correct Answer: A
Rationale: NKT cells recognize lipids via CD1 ; they share NK and T-cell traits but are defined by CD1 specificity.
Question 4 of 5
Which cells in the thymus are responsible for expressing tissue-specific antigens through the action of AIRE?
Correct Answer: A
Rationale: Medullary thymic epithelial cells express tissue-specific antigens via AIRE for negative selection.
Question 5 of 5
Vaccines generally confer what type of immunity?
Correct Answer: B
Rationale: Vaccines stimulate active immunity artificially ; passive (A, C) involves antibody transfer, natural active is from infection.