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In Figure 1.5, at which of the following points would the opportunity cost of producing another doughnut be greatest?
Spontaneous Depolarization
The self-initiated transition of a cell's membrane potential to a less negative value.
Cardiac Electrical Impulse
The electrical signals that stimulate the heart to contract, crucial for maintaining a consistent heart rhythm.
SA Node
Sinoatrial node, the heart’s natural pacemaker, located in the right atrium, responsible for setting the rate of heart beats by sending out electrical impulses.
Asystole
A state of no cardiac electrical activity, leading to a lack of contraction of the heart and cessation of blood flow; essentially, cardiac arrest.
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