3 Questions
What is the resting membrane potential of the SA node?
-60 mV
What causes the SA node to fire spontaneously?
Influx of Na+ ions
What is the threshold potential for firing an action potential in the SA node?
+10 mV
"Unravel the Mystery of Self-Excitation in the SA Node: Test Your Knowledge!" Discover the fascinating world of cardiology by exploring the inner workings of the sinoatrial node. Learn what causes the SA node to fire spontaneously and the role of inherent leakiness in nodal fibers. Test your understanding of the rising membrane potential and action potential thresholds with this quiz. Come and explore the intricacies of Ca2•-Na• inflow, slow Na• inflow, and fast
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