Transpiration & Translocation

• Which part of the plant is glucose produced in? 

  leaves
• What do we call the movement of cell sap (a mixture of sugar and water) up and down the plant?

  translocation
• Phloem cells have _________ in their end walls to allow cell sap to pass along the phloem tube. 

  pores
• What does the xylem transport in a plant?

  Water and dissolved mineral ions
• How do root hair cells absorb water from the soil?

  Osmosis
• How do root hair cells absorb mineral ions from the soil?

  active transport
• Which substance are xylem cells reinforced with to make them stronger? 

  lignin
• What is transpiration?

  The evaporation of water from the leaves
• What happens to the transpiration rate as the temperature increases?

  increases
• Are stomata normally open or closed during the night?


  closed
• Why does the rate of transpiration increase if the light intensity is increased?

  The stomata open wider to let more carbon dioxide into the leaf for photosynthesis.
• What happens to the rate of transpiration if wind speed increases?

  increases
• Why does water loss slow down if a plant is put into a plastic bag?

  The humidity increases