Journey inside the cell to see how the cell membrane acts as both a barrier and an entrance. How does it take in nutrients while keeping out potentially damaging molecules?
- The cell membrane protects the cell contents from their environment and controls the entry and exit of substances.
- Diffusion is when particles move from an area of high to low concentration.
- The diffusion of water across a selectively permeable membrane from high to low concentration is called osmosis.
- The transport of molecules across the cell membrane is a vital process.
All cells – from blood cells to sperm cells, plant cells to bacteria – are enclosed by an important structure called a cell membrane.
The cell membrane performs two vital roles.
It contains all the cell's contents, separating the inside of the cell from its environment.
And it also determines what substances …
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