How come people feel pain?

Hope this helps!

Explanation:

"When your body is injured in some way or something else is wrong, your nerves (cells that help your body send and receive information) send millions of messages to your brain about what's going on. Your brain then makes you feel pain." -Why Do I Have Pain? (for Kids) - Nemours KidsHealth

I didn't write that, but I gave credit to whoever did.

Enzymes are also known as  Biological catalysts. An enzyme working at its maximum possible rate, where the substrate concentration is in excess is V max.

The reaction is slow because the molecules are moving slowly and they will not often collide with the active site of an enzyme, so the binding of an enzyme and substrate is rare.