The plasma membrane / cell surface membrane. The phospholipid bilayer prevents certain substances passing straight through, so protein channels and other mechanisms control what does and does not pass in and out of the cell.
This is the cell membrane, the fluid mosaic, or the phospholipid bilayer.All names of the control membrane for in/out traffic of the cell.
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The Nucleus
I think you are talking about the nucleus, which is the "brain" of the cell. It controls everything that cell does.
The nucleus is what controls the cell.
nucleus
the nucleus.
nucleus controls the cell functions with directions given by the chromosomes inside of it
The nucleus is the part of the cell that controls all the activities of the cell. The nucleus is like the main office of a factory.
The nucleus is the control center of the cell.
The cell membrane
it is the cell wall ! :)