Transpiration
Loss of water in a plant mainly in the stomata and can generally happen in the air
Transpiration stream = movement of water up a plant
Happens faster in more hot, dry and windy conditions
Cuticle = waxy layer of a leaf
Prevents too much water loss from the leaves
Guard cells = control the size of the stomata and can regulate the amount of water lost by transpiration
Cohesion = when water molecules are attracted to each other
Generally thicker for plants living in dry areas
Stomata close = when plants lose water faster than normal
Without the process, the plants may die because the water is lost excessively
4 stages of transpiration
Water is loss from the leaves due to evaporation , heat and water loss from the stomata
Produces a concentration gradient where water moves using osmosis from a high conetration in the roots to low concentration in the leaves
Concentration gradient = difference in concentration of a dissolved substance in a solution between a region of high concentration and one of lower concentration .
Water moves in roots to the leaves, more water is drawn from the soil into the root hair cells. This happens because water moves using osmosis in the root hair cells
Root hair cell = absorbs water and minerals from the soil
