Osmosis (Leaving Cert Biology): Flashcards

Water movement from high to low water conc. across semi-permeable membrane

No, it is a passive process

Water molecules only

Plant cell full of water, firm, under turgor pressure

Pressure of vacuole & cytoplasm against cell wall

Plant cell lost water, membrane pulls from wall

Becomes turgid, water enters by osmosis

Becomes plasmolysed, water leaves by osmosis

Plant wilts

Expands and bursts, no cell wall for support

Shrinks, loses shape, becomes dehydrated

Same water conc. inside & outside cell, no net movement

Lower water conc. than cell, water moves out

Higher water conc. than cell, water moves in