Osmosis is the movement of water from a higher water concentration to a lower water concentration through a partiallypermeablemembrane.
Dilute solutions have a higher concentration of water molecules than concentrated solutions which have a low concentration of water solutions.
Osmosis in animal cells:
Animal cells have no cell wall to stop them from swelling up or shrinking due to osmosis.
In dilute solutions (e.g. water), animal cells can burst.
In concentrated solutions, animal cells can shrink.
Osmosis in plant cells - Plant cells have a cell wall which allows them to swell up without bursting. We use specific terms to describe the effects of osmosis on plant cells:
In dilute solutions (e.g. purewater) plant cells become turgid (swollen).
In concentrated solutions (e.g. solutions with a high concentration of sugar) plant cells become sunken.
Which enzyme breaks down fat?
Lipase
Substances move in and out of cells. How does oxygen move into and out of cells?
Diffusion
At high pH values the active site of the enzyme pepsin changes shape. When the active site of the enzyme changes shape, the enzyme is denatured.
