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Consider the following code snippet: Which of the following statements about this code is correct?
Na+ Channels
Specialized proteins in cell membranes that allow sodium ions to enter or leave a cell, playing a key role in generating electrical signals.
SA Node
The sinoatrial node, a group of cells located in the right atrium of the heart that initiates the electrical impulses governing the heart rate, often considered the heart's natural pacemaker.
Depolarization
The process by which the resting potential of a cell membrane becomes less negative, leading to the initiation of an action potential.
Heart Rate
The number of heartbeats per unit of time, usually measured in beats per minute (bpm), indicating the heart's workload and overall cardiovascular health.
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