ATI RN
Cardiovascular System Anatomy Questions and Answers Questions
Question 1 of 5
Which statement about blood types is true?
Correct Answer: D
Rationale: Type AB (D) are universal recipients, accepting all ABO types.
Question 2 of 5
The coronary arteries branch off of the
Correct Answer: B
Rationale: Coronary arteries arise from the ascending aorta (B), just above the aortic valve, supplying the heart.
Question 3 of 5
Which of the following is unique to cardiac muscle cells?
Correct Answer: C
Rationale: Autorhythmicity (C) is unique to cardiac muscle (pacemaker cells). Sarcoplasmic reticulum (A), gap junctions (B), and mitochondria (D) exist in other muscles too.
Question 4 of 5
Of the three germ layers that give rise to all adult tissues and organs, which gives rise to the heart?
Correct Answer: C
Rationale: The mesoderm (C) forms the heart and circulatory system during embryogenesis.
Question 5 of 5
Based on an understanding of beta blockers used for unstable angina, the nurse administers a beta blocker because of which of the following actions?
Correct Answer: B
Rationale: Beta blockers (B) decrease heart rate, reducing oxygen demand in unstable angina. They don’t increase contractility (A), shift fluids (C), or vasodilate coronaries (D).