ATI RN
Questions About the Cardiovascular System Questions
Question 1 of 5
What type of tissue comprises the valves of the heart?
Correct Answer: A
Rationale: Heart valves are made of dense connective tissue (A), providing strength and flexibility. Areolar tissue (B) is loose, hyaline cartilage (C) is in joints, and cardiac muscle (D) forms the heart wall.
Question 2 of 5
Cardiac output can be computed by:
Correct Answer: D
Rationale: Cardiac output = stroke volume × heart rate (D), e.g., 70 ml × 75 bpm = 5.25 L/min.
Question 3 of 5
The upper chambers of the heart
Correct Answer: B
Rationale: The atria (B) are the upper, receiving chambers. Ventricles (A) pump, auricles (C) extend atria, trabeculae (D) are in ventricles.
Question 4 of 5
The difference between systolic and diastolic blood pressure
Correct Answer: B
Rationale: Pulse pressure (B) is the difference between systolic and diastolic pressures (~40 mmHg). Mean arterial (A) is an average, others (C, D) are volume-related.
Question 5 of 5
Which of the following blood cells is a phagocyte?
Correct Answer: A
Rationale: Neutrophils (A) are phagocytic WBCs, engulfing pathogens. Platelets (B) clot, lymphocytes (C) are immune, erythrocytes (D) transport gases.