🎉 Hook: Imagine your phone charging by just moving some tiny particles from one side to another! That's a bit like how our cells power up using the Electron Transport Chain.

• The Electron Transport Chain (ETC) is like a tiny electric circuit inside mitochondria.
• Its job? To create a "proton gradient" - basically, more protons on one side than the other.

• Electrons come to the party, brought in by something called "reduced NAD".
• These electrons hop from one carrier to the next in the ETC, like kids playing a game of "pass the parcel."
• At every stage of this electron-passing, energy is released.

• Think of proton pumps like water pumps in a carnival dunk tank. Every time energy is released (from the electron game above), these pumps send protons flying!
• There are 3 main carriers (or pumps) in the ETC.
  • First two pumps: 4 protons each. (Imagine them as big super-soakers!)
  • Third pump: 2 protons. (A smaller squirt gun!)
• Total protons splashed out from the matrix to the space in between the membranes? 10 protons for every pair of electrons from reduced NAD.