The patient asks the nurse to explain the function of the sinoatrial node in the heart. What is the nurse's best response?
a. "The sinoatrial node stimulates the heart to beat in a normal rhythm."
b. "The sinoatrial node protects the heart from atherosclerotic changes."
c. "The sinoatrial node provides the heart with oxygenated blood."
d. "The sinoatrial node protects the heart from infection."
ANS: A
The sinoatrial node is the natural pacemaker of the heart, and it assists the heart to beat in a normal rhythm. The sinoatrial node does not protect from atherosclerotic changes or infection, and it does not directly provide the heart with oxygenated blood.
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