ATI RN
NCLEX Practice Questions Cardiovascular System Questions
Question 1 of 5
Which of the following types of white blood cells is thought to play a role in the prevention of clotting?
Correct Answer: C
Rationale: Basophils (C) release heparin, an anticoagulant.
Question 2 of 5
Granulocytes that phagocytize microorganisms for cellular defense; most numerous leukocyte
Correct Answer: A
Rationale: Neutrophils (A) are most numerous (60-70%) and phagocytize bacteria.
Question 3 of 5
Substance needed by the liver to make prothrombin
Correct Answer: A
Rationale: Vitamin K (A) is essential for liver synthesis of prothrombin.
Question 4 of 5
A differential white blood cell count would not be appropriate to:
Correct Answer: C
Rationale: Differential counts assess WBC types, not lipids (C).
Question 5 of 5
One of the following is not a formed element found in blood.
Correct Answer: D
Rationale: Plasma (D) is liquid, not a formed element.