ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
Identify the vessels that return blood to the right atrium.
Correct Answer: A
Rationale: The right atrium receives deoxygenated blood from the body via the superior vena cava, inferior vena cava, and coronary sinus (A, drains heart muscle). Pulmonary veins (B, D) return oxygenated blood to the left atrium, and pulmonary arteries (C) carry blood from the right ventricle to lungs.
Question 2 of 5
During ventricular systole, the atria are ___ the ventricles are ___ the AV valves are ___ and the SL valves are ___
Correct Answer: C
Rationale: During ventricular systole, atria relax, ventricles contract, AV valves close (S₁), and SL valves open (C) to eject blood. B is atrial systole, A/D mismatch phases.
Question 3 of 5
The layer of blood vessels consisting of an endothelial layer with a basement membrane is the tunica:
Correct Answer: C
Rationale: The tunica interna (C), or intima, is the innermost layer with endothelium and basement membrane. Arterioles (A) are vessels, externa (B) is outer, and media (D) is muscular.
Question 4 of 5
If the diameter of a blood vessel decreases, then the resistance will ___, thus blood pressure will ___
Correct Answer: C
Rationale: Per Poiseuille’s law, decreased diameter increases resistance (C, ∝ 1/r⁴), raising BP if flow is constant. A, B, D mismatch resistance-BP relationship.
Question 5 of 5
Pulse is defined as a(n):
Correct Answer: A
Rationale: Pulse is the arterial wall’s expansion and recoil (A) with each heartbeat. B is the cause, C is systolic pressure, D is diastolic, not the pulse itself.