Diffusion and Osmosis Chp13 Flashcards

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1
Q

What is a selectively permeable membrane

A

a membrane that allows some but not all molecules to pass through

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2
Q

What is diffusion

A

the spreading out of molecules from a region of high concentration to a region of low concentration

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3
Q

What is osmosis

A

the movement of water molecules across a semi-permeable membrane from a region of high water concentration to a region of low concentration

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4
Q

What is turgor pressure

A

the outward pressure of the cytoplasm and the vacuole against the cell wall of a plant

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5
Q

Osmosis and food preservation

A

foods such as fish are covered in salt meaning bacteria on fish have water pulled out of them as concentration outside is so low

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