Imagine a rock concert in your body! 🎸 Every time you touch, feel, or think, there's a wave of electricity, like a rock star diving into a crowd, spreading the vibes. This 'electrical wave' is called an action potential! Let's break it down.

• It's an electric wave that zooms along nerve fibers.
• Imagine watching a movie 🎬: You can track the action potential using electrodes, kind of like putting a camera on our rock star. The movie screen shows voltage changes over time.

Main Events on the Action Potential Stage

• Resting potential: -70mV (the quiet before the concert begins).
• Depolarization: The crowd goes wild! Voltage turns from negative to positive.
• Repolarization: Calming down and returning from positive to negative.

Remember: This voltage dance is all about ions, not electrons.

• What causes the concert's sudden burst of energy? Sodium channels in the nerve's membrane open!
• Sodium ions (Na+) rush in like fans swarming in. Why? There are 10 times more sodium ions outside than inside.
• Result? Inside becomes positive! Voltage goes from around -70mV to a rocking +30mV.

Real-world example: Imagine a gate opening at a popular theme park 🎢, and everyone rushes in. That's like sodium ions entering the neuron.