ATI RN
Cardiovascular System Questions and Answers Quizlet Questions
Question 1 of 5
The client has a complete heart block. Which of the following is true regarding this?
Correct Answer: C
Rationale: In complete heart block (third-degree), all impulses are blocked at the AV node (C), causing ventricles to beat independently at 20-40 bpm via Purkinje fibers, not 60 (A). The SA node functions normally (B is false), and BP is typically low (hypotension) due to bradycardia, not high (D). (Source: Document, p. 6-7)
Question 2 of 5
Identify the blood vessel that carries blood from the left ventricle.
Correct Answer: A
Rationale: The aorta (A) carries oxygenated blood from the left ventricle to the body. The pulmonary artery (B) carries deoxygenated blood from the right ventricle, pulmonary vein (C) to the left atrium, and superior vena cava (D) to the right atrium.
Question 3 of 5
What wave of an ECG (EKG) represents depolarization of the atria?
Correct Answer: A
Rationale: The P wave (A) represents atrial depolarization. QRS (B) is ventricular depolarization, T wave (C) is ventricular repolarization, and PQ interval (D) is a time segment, not a wave.
Question 4 of 5
The sympathetic nervous system will ___ contraction strength of the heart, thus leading to a(n) ___ in stroke volume.
Correct Answer: C
Rationale: Sympathetic stimulation increases contraction strength (inotropy, C) via norepinephrine, increasing stroke volume. A, B, D mismatch physiology.
Question 5 of 5
Identify the process that allows for the movement of fluid into the capillary at its venous end.
Correct Answer: D
Rationale: Osmosis (D) drives fluid into the capillary at the venous end, where oncotic pressure exceeds hydrostatic pressure, reabsorbing water. Filtration (C) occurs at the arterial end, A/B don’t fit.