Substances can move into and out of cells through the cell membrane. The three main types of movement are diffusion, osmosis and active transport. If a red blood cell is placed in water, water enters the cell by osmosis. Because the membrane is quite weak the cell will burst as the volume and therefore the. Despite being only 6 to 10 nanometers thick and visible only through an electron microscope, the cell membrane keeps the cell's cytoplasm in place and lets.
Seinen: Osmosis in a cell membrane
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