ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
Venoconstriction increases which of the following?
Correct Answer: D
Rationale: Venoconstriction narrows veins, increasing pressure (A), flow (B), and venous return to the heart (C), thus all (D), aiding circulation.
Question 2 of 5
Ventricular relaxation immediately follows
Correct Answer: B
Rationale: Ventricular relaxation (diastole) follows ventricular repolarization (B), marked by the T wave.
Question 3 of 5
The nurse is caring for a client with hypertension. Which of the following drugs should the nurse administer?
Correct Answer: B
Rationale: Dyazide (B), a diuretic combo, treats hypertension by reducing blood volume. Mexiletine (A) is an antiarrhythmic, digoxin (C) treats heart failure, warfarin (D) is an anticoagulant.
Question 4 of 5
The nurse should monitor a client with an acute myocardial infarction who is receiving intravenous streptokinase (Streptase) for which of the following serious adverse reactions?
Correct Answer: A
Rationale: Streptokinase (A), a thrombolytic, risks intracranial hemorrhage, a life-threatening complication. Nausea (B), MI extension (C), and embolus (D) are less directly related.
Question 5 of 5
Approximately what percentage of carbon dioxide is found in expired air?
Correct Answer: C
Rationale: Expired air contains about 4-5% carbon dioxide, significantly higher than the 0.04% in atmospheric air, due to CO₂ exhalation from metabolism. 20% and 40% are too high, reflecting oxygen or total gas misconceptions.