Diffusion and Osmosis Chp13 Flashcards
1
Q
What is a selectively permeable membrane
A
a membrane that allows some but not all molecules to pass through
2
Q
What is diffusion
A
the spreading out of molecules from a region of high concentration to a region of low concentration
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
4
Q
What is turgor pressure
A
the outward pressure of the cytoplasm and the vacuole against the cell wall of a plant
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
