Transpiration (AQA GCSE Biology): Flashcards
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Transpiration definition
Transpiration definition
Water absorbed by roots, travels up plant, evaporates from leaves
How water enters plant roots
How water enters plant roots
By osmosis through root hair cells
Function of xylem vessels
Function of xylem vessels
Transport water from roots to leaves
What creates transpiration pull
What creates transpiration pull
Water evaporating from leaves
Where water evaporates in leaves
Where water evaporates in leaves
Surfaces of spongy mesophyll cells
What are stomata
What are stomata
Tiny openings in leaves where water vapour exits
Effect of increased light on transpiration
Effect of increased light on transpiration
Increases rate (stomata open wider for photosynthesis)
Effect of higher temperature on transpiration
Effect of higher temperature on transpiration
Increases rate (water evaporates faster)
Effect of high humidity on transpiration
Effect of high humidity on transpiration
Decreases rate (air already saturated with moisture)
Effect of increased wind on transpiration
Effect of increased wind on transpiration
Increases rate (removes humid air around leaf)
How transpiration aids nutrient transport
How transpiration aids nutrient transport
Carries minerals and nutrients from soil through plant
What is turgor pressure
What is turgor pressure
Pressure of cell contents against cell wall
What does a potometer measure
What does a potometer measure
Rate of transpiration by measuring water uptake