ATI RN
Cardiovascular System Questions Questions
Question 1 of 5
The contraction of the heart muscle is called
Correct Answer: C
Rationale: Systole (C) is heart muscle contraction (atrial or ventricular). Diastole (A) is relaxation, peristalsis (B) is GI movement, and spasm (D) is involuntary contraction.
Question 2 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 3 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 4 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 5 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.