4: gets out metabolic reactions near the inner surface of the cell membrane - the cytosol does this, which resides in the cell membrane
I'm not exactly sure what you mean when you put this (see below) in the question, if you explain what you meant when you wrote that I will try to answer. Thanks
Explanation: Meteors are rocks, unlike stars. Comets are usually made up of many materials such as ice, rock, and/or dust. Asteroids are also too small to be classified as big as a moon. Most Meteors are big enough to be a moon.
The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body. If your body didn't do it simultaneously, then blood would overflow your lungs.