2. When alcohol or other depres- sants slow down the work of this organ,
all other body parts are slowed also.

I would say your answer would be the brain

Explanation:

If your brain slows down so will the rest of your body because your brain controls your body. Therefore the brain would be the correct answer.

antibodies

explanation:

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.