ATI LPN
Cardiovascular NCLEX Questions Questions
Question 1 of 5
Which statement does not accurately describe veins?
Correct Answer: D
Rationale: This is because the pulmonary vein carries oxygenated blood from the lungs to the left ventricle.
Question 2 of 5
Which of the following phases of cardiac cycle follows immediately after the beginning of the QRS wave?
Correct Answer: D
Rationale: The QRS wave marks ventricular depolarization, followed by isovolumic contraction as ventricles begin to contract.
Question 3 of 5
Which of the following vessels has the greatest total cross-sectional area in the circulatory system?
Correct Answer: C
Rationale: Capillaries have the greatest total cross-sectional area, facilitating exchange.
Question 4 of 5
In normal condition, venous return must be:
Correct Answer: B
Rationale: In steady state, venous return equals cardiac output to maintain circulation.
Question 5 of 5
What enzyme, or combination of enzymes, protects cells against superoxide generated in oxidation reactions?
Correct Answer: C
Rationale: Superoxide dismutase converts superoxide to H2O2, which catalase then breaks down to water.