1.8 Osmosis in plants Flashcards
1
Q
What does turgor pressure mean
A
The pressure inside a plant cell exerted by the cell contents pressing on the cell wall
2
Q
Why do plants rely on osmosis
A
Support stem and leaves, water moves in causing vacoule to swell to support it.
3
Q
Explains the steps of turgor pressure
A
Water moves into cell by osmosis - vacoule swells - cytoplasm pressed against cell wall - cell becomes rigid - leaves and stem become rigid
4
Q
What happens if the fluid surrounding the cell is hypertonic
A
Water leaves cell, no longer be firm and swollen become flacid, no pressure. Plant wilts no longer support.
5
Q
What does flacid mean
A
soft
6
Q
What is plasmolysis
A
When more water is lost the vacoule and cytoplasm shrink, cell membrane pulls away (shrivel) from cell wall. Usually in laboratory
