ATI RN
Cardiovascular System Questions Questions
Question 1 of 5
The heart wall receives blood from the
Correct Answer: B
Rationale: The heart wall (myocardium) is supplied oxygenated blood by coronary arteries (B) branching from the aorta. Blood in chambers (A) doesn’t nourish the wall, cardiac veins (C) drain it, and pulmonary arteries (D) supply lungs.
Question 2 of 5
Identify the type of vessel that functions in exchange of blood gases, nutrients, and wastes.
Correct Answer: D
Rationale: Capillaries (D) are thin-walled, allowing gas, nutrient, and waste exchange between blood and tissues. Arteries (A), arterioles (B), and venules (C) transport, not exchange.
Question 3 of 5
Blood pressure is highest in the ___ and lowest in the ___
Correct Answer: B
Rationale: Blood pressure is highest in the aorta (B, ~120/80 mmHg) and lowest in the vena cavae (~0-5 mmHg) as it returns to the heart. Capillaries (A, C) are intermediate (~25 mmHg), arterioles (D) higher than capillaries.
Question 4 of 5
Place the events of the angiotensin/aldosterone pathway in order of occurrence. 1. Formation of angiotensin II, 2. Increase in blood volume, 3. Reabsorption of sodium and water, 4. Secretion of aldosterone, 5. Secretion of renin
Correct Answer: D
Rationale: Order: 5. Renin secretion (low BP), 1. Angiotensin II formation (via ACE), 4. Aldosterone secretion (adrenals), 3. Sodium/water reabsorption, 2. Increased blood volume (D). A, B, C misorder steps.
Question 5 of 5
The common iliac artery is in which blood circuit?
Correct Answer: C
Rationale: The common iliac artery is part of systemic circulation (C), supplying the lower body. Pulmonary (A) is lungs, coronary (B) is heart, pelvic (D) isn’t a circuit.