ATI RN
Cardiovascular System Anatomy Questions and Answers Questions
Question 1 of 5
Identify the fetal structures that help circulation to by-pass the lungs.
Correct Answer: B
Rationale: The ductus arteriosus (shunts pulmonary artery to aorta) and foramen ovale (right to left atrium, B) bypass the fetal lungs. Ductus venosus (A) bypasses liver, umbilical vessels (C, D) connect to placenta.
Question 2 of 5
Hepatic portal system originates from:
Correct Answer: D
Rationale: The hepatic portal system originates from the gut (D, intestines/stomach), carrying nutrient-rich blood to the liver. Liver (A) is the destination, kidney (B) is unrelated, and capillaries (C) are too general.
Question 3 of 5
Closure of the aortic valve occurs before the following event:
Correct Answer: B
Rationale: Aortic valve closure (S₂) marks the start of isovolumetric relaxation (B), when ventricles relax but valves are closed. A is systole start, C and D are vague.
Question 4 of 5
In determining blood pressure by auscultatory method the first sound indicates:
Correct Answer: C
Rationale: The first Korotkoff sound (C) marks systolic pressure (~120 mmHg) as the cuff pressure drops below arterial peak. A is last sound, B and D are incorrect.
Question 5 of 5
Contraction of the atria of the heart leads to blood moving directly
Correct Answer: D
Rationale: Atrial contraction pushes blood through atrioventricular valves (D, tricuspid and mitral) into ventricles. Auricles (A) are atrial extensions, arteries (B) and veins (C) are not directly involved.