ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
What vessels deliver oxygen rich blood to the legs?
Correct Answer: A
Rationale: External iliac arteries (A) deliver oxygen-rich blood to the legs from the common iliacs. Internal iliac veins (B) drain, inferior vena cava (C) returns to heart, hepatic portal (D) is digestive.
Question 2 of 5
Blood pressure is higher in:
Correct Answer: D
Rationale: Blood pressure increases with age due to arterial stiffening, peaking in the elderly (D, ~130-140/80 mmHg). Infants (A, ~90/60), adolescents (B, ~110/70), and adults (C, ~120/80) have lower values.
Question 3 of 5
Starling's law of the heart:
Correct Answer: C
Rationale: Starling’s law (C) states that increased venous return (preload) stretches the heart, increasing stroke volume and cardiac output. A is false (it operates but may fail), B is false (it applies), and D is sympathetic.
Question 4 of 5
First heart sound occurs during the period of:
Correct Answer: C
Rationale: S₁ occurs at isovolumetric contraction (C), when AV valves close and ventricles begin systole. Relaxation (A, B) is diastole, isotonic contraction (D) is ejection.
Question 5 of 5
Which of the following terms identifies the anatomical region found between the lungs that extends from the sternum to the vertebral column and from the first rib to the diaphragm?
Correct Answer: D
Rationale: The mediastinum (D) is the central thoracic region between the lungs, from sternum to spine and first rib to diaphragm, housing the heart. Epicardium (A) is the heart’s outer layer, abdominal cavity (B) is below the diaphragm, and pericardium (C) is the heart’s sac.