Questions and Answers
Water from the root hair moves to the cortical cells by ______.
osmosis
The apoplastic movement of water occurs exclusively through the ______ and the walls of the cells.
intercellular spaces
In the symplast pathway, water molecules move through the plasma membrane, ______, and plasmodesmata.
cytoplasm
Apoplastic movement does not involve crossing the cell ______.
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The movement of water into the root cells can be classified into apoplast and ______ pathways.
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Study Notes
Pathway of Water Absorbed by Roots
- Water enters root hairs, increasing concentration in root hair cells compared to cortex.
- Water moves from root hairs to cortical cells through osmosis, then reaches the xylem.
- Water is subsequently transported to the stem and leaves.
Types of Movement of Water into Root Cells
- Water absorption leads to movement deeper into root layers via two pathways: apoplast pathway and symplast pathway.
Apoplast Pathway
- Involves movement of water through intercellular spaces and cell walls.
- Does not require crossing cell membranes, allowing for faster movement.
- Dependent on the concentration gradient.
Symplast Pathway
- Water moves between adjacent cells through plasma membrane, cytoplasm, and plasmodesmata.
- This transport method is slower due to membrane crossing.
- Follows the concentration gradient, ensuring efficient water movement.
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Description
This quiz explores the pathway of water absorption by plant roots. It covers the mechanisms of osmosis involved in the movement of water from root hairs to cortical cells and their journey to the xylem. Test your knowledge on the types of water movement and the functions of root cells!
