What exactly tells us we need to pee, and how is the duration of when we need to pee set?

Question

Or rather what speeds up the point of needing to pee?

I know the body part that does it, but what chemical/reaction makes it happen and how so?

*Honestly, I don’t know if my words are making sense, I hope someone understands.*

In: Biology

Answer 1

As for duration of pee, you pee for 20 seconds.

All animals that pee do so for 20 seconds. I’m serious. Count the next time you pee.