What controls which materials goes in and out of the cell?

Where can a neurologist work? What sea is 70 degrees South and 40 degrees west? What is a special attraction? What is the most powerful element ever in the world? Where is the national center for rocket and space research? What is relative area? What is the phase that allows cadets to accomplish a deeper understanding of new information and engage in activities that require them to make sense of the information in the lesson? What part of the brain is responsible for problem vision? Is there any change in the earth's axis due to the recent earthquake in Japan? What can you do with nuclear fusion? Jim sells his watch to buy a pier glass for his wife? What does the aperture on a microscope do? What is a little organelle that carries materials from one part of the cell to another that doesnt live long but can be recycled? What type of Herbivore eats plants and also lives in the rain forest? How can a chemical change help tell the difference between a element and a compound? Which object will accelerate more if the same force is applied to both a pickup truck or a trctor-trailer truck? What would happen to a protein if it was exposed to extreme heat? Can cyanide kill animals? Are rocks always changing? Is gold chemically bonded or a mixture?

What controls which materials goes in and out of the cell?