ATI RN
Cardiovascular System Questions and Answers Questions
Question 1 of 5
The nucleated stem cell from which red blood cells develop
Correct Answer: C
Rationale: Hemocytoblasts (C) are pluripotent stem cells for RBCs.
Question 2 of 5
A healthy elastic artery
Correct Answer: A
Rationale: Elastic arteries (e.g., aorta) are compliant (A), stretching to accommodate systolic pressure. They don’t reduce flow (B), aren’t resistance vessels (C, muscular arteries), and have thick, regular walls (not D).
Question 3 of 5
Which of the following statements is true?
Correct Answer: B
Rationale: One umbilical vein (B) carries oxygenated blood from placenta to fetus; two arteries carry deoxygenated blood to placenta (not lungs, C).
Question 4 of 5
Most blood enters the ventricle during
Correct Answer: B
Rationale: Most ventricular filling (~70-80%) occurs passively during atrial diastole (B) when AV valves are open.
Question 5 of 5
Upon finding a client in cardiac arrest, the nurse should administer which of the following drugs first?
Correct Answer: B
Rationale: Epinephrine (B) is the first drug in ACLS for cardiac arrest to stimulate cardiac activity. Atropine (A) treats bradycardia, lidocaine (C) arrhythmias, atenolol (D) hypertension.