Action potentials aren't just used for neuron sending signals, action potentials are used for muscles to contract and for these glands to release their substances. The inside of the cell will be different in regards to its... Concentration of things? It's different chemicals. Specifically, we need to talk about the ions. Potassium is K plus sodium, which is Na plus chloride. I'll give you a negative one. Chloride, which is Cl negative. Phosphate. Yes. Which is Po4 negative. Yep. Do you want to keep going? No. But you can just translate that into other tissues. Something else. Right? Okay.