The answer to the question is the cell membrane. The cell membrane is a biological membrane that seprates the interior of all cells from the outside enviorment.
my answer by Ann: enzymes
Regulates what goes in and out of the cell. :)
It is a thin, flexible barrier that regulates what goes out and into the cell.
They protect the cell, give it shape and regulates what goes in and out of the cell.
The cell membrane regulates what goes in and out of the organism.
The cell membrane, which is a partially permeable membrane which 'selects' what goes in and comes out of a cell.
A body membrane regulates what goes in the body in general, but the cell membrane regulates what goes in and out if the cell.
Regulates what goes in and out of the cell. :)
Plasma membrane
It regulates what goes in and out of the cell.
controls the cell and regulates everything that goes on inside....
The cell membrane, it regulates what enters and exits the cell. The cell membrane only exists in animal cells; plants have a cell wall, but no cell membrane.
The Cell Membrane protects the cell and regulates what substances enter and leave it. It is like the "gate keeper"
It is a thin, flexible barrier that regulates what goes out and into the cell.
They protect the cell, give it shape and regulates what goes in and out of the cell.
The cell membrane regulates what goes in and out of the organism.
The cell membrane determines what comes in and what goes out. Water goes in and out by osmosis which is a passive method. Others require the help of proteins that act as doorways. These require energy and the method is called active transportation.
The cell membrane, which is a partially permeable membrane which 'selects' what goes in and comes out of a cell.