ATI RN
Cardiovascular System Quiz Questions Questions
Question 1 of 5
The heart is located in the:
Correct Answer: A
Rationale: The heart is situated in the thoracic cavity, specifically within the mediastinum, between the lungs. The abdominal cavity (Choice B) contains organs like the stomach and liver, the pelvic cavity (Choice C) houses reproductive and urinary organs, and the cranial cavity (Choice D) contains the brain. Only the thoracic cavity correctly identifies the heart’s location.
Question 2 of 5
Impulses through the conduction system of the heart follow the ordered path:
Correct Answer: C
Rationale: The cardiac conduction system starts at the sinoatrial (SA) node (pacemaker), impulses travel to the atrioventricular (AV) node, then through the atrioventricular bundle (Bundle of His), and finally to the Purkinje fibers, stimulating ventricular contraction.
Question 3 of 5
The blood vessels that are under the greatest pressure are:
Correct Answer: A
Rationale: Large arteries (e.g., aorta) experience the highest pressure (around 120 mmHg systolic) directly from ventricular ejection. Pressure decreases progressively in small arteries, capillaries (around 35 mmHg), and veins (near 0 mmHg).
Question 4 of 5
The substance in the blood that helps to maintain the osmotic pressure is:
Correct Answer: B
Rationale: Plasma proteins (e.g., albumin) maintain colloid osmotic pressure (about 25 mmHg), drawing fluid back into capillaries. Lipids and vitamins have minimal osmotic roles, and histamine affects permeability, not pressure.
Question 5 of 5
Which of the following carry deoxygenated blood from the right atrium to the lungs?
Correct Answer: C
Rationale: The pulmonary arteries carry deoxygenated blood from the right ventricle (after passing through the right atrium) to the lungs for oxygenation. Pulmonary veins carry oxygenated blood back to the left atrium, the aorta carries oxygenated blood systemically, and the superior vena cava delivers deoxygenated blood to the right atrium.