ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
Identify the hormone(s) that will increase blood volume and thus blood pressure.
Correct Answer: B
Rationale: ADH (antidiuretic hormone) and aldosterone (B) increase blood volume (water retention, sodium reabsorption), raising BP. ANH (C, atrial natriuretic hormone) decreases it.
Question 2 of 5
The two major opening of the left ventricle are:
Correct Answer: C
Rationale: The left ventricle has the bicuspid (mitral) valve (inflow from left atrium) and aortic valve (outflow to aorta, C). Pulmonary veins (A) enter the atrium, tricuspid (B) is right-sided, and inferior vena cava (D) enters the right atrium.
Question 3 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 4 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 5 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.