ATI RN
Lymphatic and Immune System Test Questions Questions
Question 1 of 5
Proteins produced by virus-infected cells that protect non-infected cells are:
Correct Answer: D
Rationale: Interferons protect uninfected cells from viral spread.
Question 2 of 5
The body's first line of defense against the invasion of disease-causing microorganisms is:
Correct Answer: C
Rationale: Skin and mucous membranes are the first physical barriers; phagocytes , NK cells , inflammation , and fever act later.
Question 3 of 5
Antigen sequestration is
Correct Answer: C
Rationale: Sequestration isolates antigens (e.g., brain); not phagocytosis , lymphocyte removal , or Peyer's .
Question 4 of 5
Polymorphonuclear granulocytes include:
Correct Answer: C
Rationale: Neutrophils are PMNs; B-cells and T-cells are lymphocytes, endothelial are structural.
Question 5 of 5
In bacterial infections, T cytotoxic cells do not seem to be very important. This is because:
Correct Answer: B
Rationale: Bacteria lack MHC I, needed for cytotoxic T cells; they're extracellular, not resistant or MHC II-related .