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Endocytosis
because they are programmed to do what they are made for.
== == Some Substance but not others to enter and leave a cell == == Some Substance but not others to enter and leave a cell
If substances did not pass through cell membranes, then all single-celled and multicellular organisms would die.
cell membrane
the process that causes the water to enter and leave the cell is diffusion
Endocytosis
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because they are programmed to do what they are made for.
Either active transport, passive transport, or facilitated diffusion
Either active transport, passive transport, or facilitated diffusion
The process of substances leaving a cell is called diffusion. The cell membrane is a selective permeable membrane that only allows certain materials to enter or leave the cell.
== == Some Substance but not others to enter and leave a cell == == Some Substance but not others to enter and leave a cell
If substances did not pass through cell membranes, then all single-celled and multicellular organisms would die.
cell membrane
?
Proteins made on "bound" (attached) ribosomes leave through the cell membrane, and other proteins will enter the cell.