ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
This sets glomerular capillary pressure apart from other capillaries found in the body
Correct Answer: B
Rationale: Glomerular capillary pressure is higher (~55 mmHg) than in systemic capillaries (~25 mmHg) due to the afferent arteriole’s larger diameter and efferent arteriole’s resistance, enhancing filtration for urine formation. Lower pressure (A) is typical elsewhere.
Question 2 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 3 of 5
Define artherosclerosis.
Correct Answer: A
Rationale: Atherosclerosis is the hardening and narrowing of arterial walls (A) due to plaque buildup. It doesn’t harden the heart (B), destroy cells (C), or solely inflame walls (D; inflammation is a factor, not the definition).
Question 4 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 5 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.