Osmosis in Plants:
The diffusion of water from a region of high concentration to a region of low concentration through a partially permeable membrane.
DILUTE --> CONCENTRATED
Plants use water to keep their leaves cool, transport minerals, enable to photosynthesise to produce glucose and keep cells rigid to ensure plant stays rigid.
In a leaf water moves out the the cell via osmosis, into the spaces of spongey mesophyll layer. The water will then leave the leaf by transpiration.
Plant cells have inelastic walls for support, the walls contain water in them. The cell walls prevents the cells from bursting.
- a lack of water; can cause a plant to wilt. The cell wall become less rigid because there is less pressure
- When there is enough water in the soil, the stomata will stay open to allow transpiration and diffusion of gases.
- When there is not enough water, the stomata will close to prevent transpiration and diffusion of gases.
Osmosis in Animal Cells:
Water diffuses in and out via osmosis. However, animal cells do not have cell walls. If there is too much water in the cell, it may burst.
1) In a weak solution; they will burst.
2) Concentrated solution;