ATI RN
ATI RN Test Bank
Cardiovascular System Questions Questions
Question 1 of 5
Which type of white blood cell plays a major role in immunity?
Correct Answer: C
Rationale: Lymphocytes (C) (T/B cells) are central to adaptive immunity.
Question 2 of 5
Granulocytes that protect against infections caused by parasitic worms
Correct Answer: B
Rationale: Eosinophils (B) target parasites with toxic granules.
Question 3 of 5
Substance that hydrolyzes fibrin strands and dissolves blood clots
Correct Answer: C
Rationale: Plasmin (C) degrades fibrin, dissolving clots.
Question 4 of 5
Which are the most numerous white blood cells?
Correct Answer: B
Rationale: Neutrophils (B) are 60-70% of WBCs.
Question 5 of 5
Which of the following statements is false?
Correct Answer: C
Rationale: Platelets (C) are fragments, not whole cells; others are true.