Transpiration (Edexcel GCSE Biology): Flashcards

Water absorbed by roots, travels up, evaporates from leaves

Root hair cells absorb water by osmosis

Transport water from roots to leaves

Capillary action & transpiration pull

Spongy mesophyll cell surfaces

Tiny openings where water vapour diffuses out of leaf

Higher rate - stomata open wider for $CO_2$

Increases rate - water evaporates faster

Lowers rate - reduced concentration gradient

Higher rate - removes humid air, increases gradient

Transports essential minerals & nutrients from soil

Water evaporation from leaves removes heat

Keeps plant upright & supports growth

Rate of transpiration via water uptake

Measures distance/speed of air bubble in tube