ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
What structures anchor the AV (atrioventricular) valves to the walls of the ventricles?
Correct Answer: C
Rationale: Chordae tendineae (C) anchor AV valves (tricuspid, mitral) to papillary muscles in the ventricles, preventing prolapse into atria. The septum (A) divides ventricles, auricles (B) are atrial appendages, and endocardium (D) is the inner lining.
Question 2 of 5
Frank Starlings law states that if more blood enters the heart,
Correct Answer: B
Rationale: Frank-Starling’s law states that increased preload (more blood) stretches cardiac muscle, leading to a stronger contraction (B) and greater stroke volume. A, C, D contradict this.
Question 3 of 5
Identify the factor that accounts for the movement of water and dissolved nutrients out of the arterial end of a capillary.
Correct Answer: A
Rationale: Hydrostatic blood pressure (~35 mmHg) at the arterial end (A) forces water and nutrients out via filtration. Osmotic pressure (B) pulls water back, diffusion (C) moves gases, and active transport (D) is minimal here.
Question 4 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 5 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.