ATI RN
Cardiovascular System Questions Questions
Question 1 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 2 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 3 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.
Question 4 of 5
Stimulation of baroreceptor leads to:
Correct Answer: B
Rationale: Baroreceptor stimulation (e.g., high BP) triggers parasympathetic activation, lowering BP and heart rate (B). A and C increase BP, D is mixed.
Question 5 of 5
Effect on force of contraction of heart is:
Correct Answer: D
Rationale: Inotropic effect (D) alters contraction force (e.g., via calcium). Chronotropic (A) is rate, dromotropic (B) conduction, bathmotropic (C) excitability.