Flashcards
Water Transport
Flashcards do conjunto (8)
- 1Describe the pathway of water from the root hair cells to the xylemWater enters through root hair cells and then passes through the root cortex, including endodermis, to reach the xylem
- 2What are the two pathways through the root?Symplast pathway
Apoplast pathway - 3Describe the symplast pathwayGoes through the living parts of cells (cytoplasm)
Water moves through plasmodesmata via osmosis - 4Describe the apoplast pathwayGoes through non-living parts of cells (cell walls)
Walls are very absorbent and H₂O can diffuse through them
When H₂O gets to the endodermis cells, its path is blocked by the casparian strip
The H₂O has to then go through a plasma membrane which control the kind of substances that pass through - 5Describe the pathway of water through the leavesAt the leaves, water leaves the xylem and moves into cells by the apoplast pathway. Water evaporate into the air spaces and diffuses out of the leaf through the stomata - this is transpiration
- 6What is the transpiration stream?The movement of water from roots to leaves
- 7How does cohesion and tension help the movement of water up the plant?Water transpires out, creating a tension which pulls more water into the leaf
Cohesive properties mean water moves as a whole column - 8How does adhesion help the movement of water up the plant?H₂O is attracted to the walls of the xylem
This is called capillary action
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- O usuário eliminou as informações de disciplina FlashCards sobre Water Transport, criado por Usuário eliminado em 05-03-2018.
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- Criado por Yinka F · 2 fev 2018
- Copiado por Yinka F · 5 mar 2018
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