Question

movement of water from inside of cell to external envionment
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Answer 1

Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane. ... Osmosis is the diffusion of water across a semi-permeable (or differentially permeable or selectively permeable) membrane.

Small molecules such as water and carbon dioxide can pass directly through the membrane because of they are neutral and so small. The movement of water through the membrane is referred to as osmosis. ... Water can also pass through the membrane through channel proteins called aquaporins (AQP).

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