ATI RN
Cardiovascular System Questions Questions
Question 1 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 2 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 3 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.
Question 4 of 5
Which of the following vitamins has closest relationship with blood?
Correct Answer: D
Rationale: Vitamin K (D) is essential for blood clotting (synthesis of factors II, VII, IX, X). Vitamins A (vision), D (calcium), and E (antioxidant) have less direct blood roles.
Question 5 of 5
Least blood pressure is at:
Correct Answer: B
Rationale: The vena cava (B) has the lowest pressure (~0-5 mmHg) as blood returns to the heart. Veins (A, ~10 mmHg), capillaries (D, ~20 mmHg), and aorta (C, ~100 mmHg) have higher pressures.