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the role of the cell membrane

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username3797988
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Hi,
Dose anyone have any information on the on what is the role of the cell membrane in regulating how nutrients are gained and wastes products lost ?

Many thanks
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C'est me
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The cell membrane allows nutrients into the cell via either passive transport, active transport or endocytosis. The process of releasing waste products is exocytosis instead of endocytosis.
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Bubbleuk
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im stuck on this questions too
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Levi.-
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(Original post by C'est me)
The cell membrane allows nutrients into the cell via either passive transport, active transport or endocytosis. The process of releasing waste products is exocytosis instead of endocytosis.
also diffusion of CO2
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Jpw1097
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(Original post by username3797988)
Hi,
Dose anyone have any information on the on what is the role of the cell membrane in regulating how nutrients are gained and wastes products lost ?

Many thanks
There are only a few ways substances can cross the cell membrane: simple diffusion, facilitated diffusion (using carrier or channel proteins), active transport, and endocytosis/exocytosis. Have a read about these mechanisms and when each one is used. It’s all to do with the size and charge of the substance; small, non-polar substances can diffuse across the membrane easily while large, charged substances do not and require other methods such as facilitated diffusion or active transport.
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