ATI RN
100 Questions on the Cardiovascular System Questions
Question 1 of 5
Identify the vessel that transports oxygen rich blood to the fetus.
Correct Answer: D
Rationale: The umbilical vein (D) carries oxygen-rich blood from the placenta to the fetus. Umbilical arteries (C) return deoxygenated blood, ductus arteriosus (A) and venosus (B) are shunts.
Question 2 of 5
Formation of blood clot is known as:
Correct Answer: A
Rationale: A thrombus (A) is a blood clot in a vessel. Thrombosis (C) is the process, fibrinolysis (B) is clot breakdown, and 'clot' (D) is vague but synonymous with thrombus.
Question 3 of 5
What is the definition of afterload?
Correct Answer: A
Rationale: Afterload (A) is the pressure (e.g., aortic pressure) ventricles overcome to eject blood. B is preload, C is contractility, D is atrial unrelated.
Question 4 of 5
Ventricular muscle receives impulses directly from the:
Correct Answer: A
Rationale: The Purkinje system (A) directly activates ventricular muscle. Bundle of His (B) and branches (C) precede, AV node (D) delays.
Question 5 of 5
Identify the structure found in a fetus that allows blood to flow directly from the pulmonary trunk into the aorta.
Correct Answer: D
Rationale: The ductus arteriosus shunts blood from the pulmonary trunk to the aorta in the fetus, bypassing the lungs. Fossa ovalis (A) and foramen ovale (B) are atrial structures, trabeculae (C) are ventricular ridges.