Cell Biology (cytology)

What are the mechanisms involved in diffusions of a cell?

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March 02, 2007 7:27PM

There are 2 processes by whicha cell can get what it needs to

live. These are 1) Active transport where the cell must expend some

energy to move something into the cell (like food molecules) and

out of the cell (like waste). The other 2) diffusion/osmosis.

Diffusion is a process where things move from areas of higher

concentration to areas of lower concentration without expending any

energy, like the smell of bacon cooking in a kitchen filling an

entire house. Try dropping a drop of food coloring into a glass of

water and, without stirring, check it a few hours later. Osmosis is

the diffusion of water.

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