ATI RN
Cardiovascular System Practice Questions Questions
Question 1 of 5
Which factor is not synthesized in hemophilia A?
Correct Answer: A
Rationale: Hemophilia A is a deficiency in factor VIII (antihemophilic factor), impairing the intrinsic pathway. Factor IX deficiency is hemophilia B, and VII and XII are unrelated to hemophilia A.
Question 2 of 5
Within the circulation, where is blood pressure highest?
Correct Answer: B
Rationale: Blood pressure is highest in the left ventricle (B) during systole (~120 mmHg), as it pumps into the aorta. The right ventricle (C) peaks at ~25 mmHg, pulmonary artery (D) is lower, vena cava (A) is near 0 mmHg, and left atrium (E) is ~8-12 mmHg.
Question 3 of 5
Identify the valve that prevents blood from flowing back into the right ventricle.
Correct Answer: B
Rationale: The pulmonary semilunar valve (B) prevents backflow from the pulmonary artery into the right ventricle during diastole. The aortic valve (A) protects the left ventricle, tricuspid (C) the right atrium, and bicuspid (D) the left atrium.
Question 4 of 5
The condition in which the AV node fails and the electrical stimulus does not reach the ventricles is called a(an)
Correct Answer: A
Rationale: Heart block (A) occurs when AV node failure prevents impulse transmission to ventricles (e.g., third-degree block). MI (B) is tissue death, arrhythmia (C) is irregular rhythm, and ectopic pacemaker (D) is an abnormal impulse source.
Question 5 of 5
If you stand up too quickly and blood pressure drops, baroreceptors in the carotid arteries will signal the cardioregulatory center to send
Correct Answer: D
Rationale: Baroreceptors detect low BP and signal the medulla to send sympathetic signals (D) to increase heart rate and vasoconstriction, restoring BP. Parasympathetic (A, B) slows HR, C opposes the response.