ATI RN
Cardiovascular System Questions Questions
Question 1 of 5
Identify the groove found on the surface of the heart and marks the boundary between the right and left ventricles.
Correct Answer: B
Rationale: The anterior interventricular sulcus (B) marks the boundary between the right and left ventricles on the heart’s front. Coronary sulcus (A) separates atria from ventricles, posterior sulcus (C) is on the back, and coronary sinus (D) is a vein.
Question 2 of 5
All of the following will increase heart rate except:
Correct Answer: C
Rationale: Parasympathetic stimulation (C) (vagus nerve) slows heart rate; others increase it via sympathetic or reflex mechanisms.
Question 3 of 5
The tough, loose-fitting outer layer of the sac covering the heart
Correct Answer: C
Rationale: The parietal pericardium (C) is the tough outer layer of the pericardial sac. Epicardium (A) and visceral pericardium (B) are on the heart, myocardium (D) is muscle.
Question 4 of 5
The amount of blood that flows out of a ventricle per unit of time
Correct Answer: B
Rationale: Cardiac output (B) is the total blood volume ejected from a ventricle per minute (stroke volume × heart rate). Stroke volume (A) is per beat, heart rate (C) is beats, afterload (D) is resistance.
Question 5 of 5
The major function of red blood cells is
Correct Answer: D
Rationale: RBCs primarily transport oxygen and CO2 (D) via hemoglobin. Nutrients (A), cytokines (B), and proliferation (C) are not their roles.