ATI RN
Cardiovascular System Questions and Answers Quizlet Questions
Question 1 of 5
Chordae tendinae is found in:
Correct Answer: D
Rationale: Chordae tendineae (D) are in the heart’s ventricles, anchoring AV valves to papillary muscles. Auricles (A) are atrial appendages, brain ventricles (B) are unrelated, and sinus venosus (C) is embryonic.
Question 2 of 5
Minimum blood Pressure is in:
Correct Answer: D
Rationale: Venules (D) have low pressure (~10-15 mmHg) post-capillary. Aorta (A, ~100 mmHg), arteries (B, ~80-100 mmHg), and capillaries (C, ~20 mmHg) are higher.
Question 3 of 5
Cardiac cycle duration in man is:
Correct Answer: B
Rationale: At 75 bpm, the cardiac cycle is ~0.8 s (B, 60/75). A is too short, C and D too long for normal rates.
Question 4 of 5
Which one of the heart sounds heard in elderly and pathologic in the young?
Correct Answer: D
Rationale: The fourth heart sound (D, S₄) is normal in the elderly (stiff ventricle) but pathologic in the young (e.g., heart failure). S₃ (C) is the reverse.
Question 5 of 5
Which network of specialized cardiac muscle fibers provide a path for each cycle of cardiac excitation to progress through the heart?
Correct Answer: D
Rationale: The cardiac conduction system (D) (SA node, AV node, etc.) coordinates excitation. Systemic circuit (A) is circulation, intercalated discs (B) connect cells, and cardiovascular center (C) regulates rate.