BRAINCAKEMovement of Water into the Root Hair Cells
If the concentration of mineral ions in the soil is higher than the concentration of mineral ions in the root hair cell, then mineral ions are taken up by root hair cells by facilitated diffusion.
Mineral ions are taken up by active transport if the concentration of the minerals in the soil is less than the concentration of minerals in the root hair cell.
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Key terms in this lesson
- diffusion
- The net movement of molecules or ions from a region of higher concentration to a region of lower concentration, down a concentration gradient.
- facilitated diffusion
- The passive movement of molecules or ions down their concentration gradient through a channel or carrier protein.
- active transport
- The movement of molecules or ions across a membrane, often against their concentration gradient, using ATP and carrier proteins.
- osmosis
- The net movement of water molecules from a region of higher water potential to a region of lower water potential through a selectively permeable membrane.
- water potential
- A measure of the tendency of water molecules to move out of a solution; pure water has a water potential of zero and adding solute lowers it.
More in Mass Transport in Plants
- Specialised Plant Cells
- Transpiration
- Movement of Water across the Roots
- Movement of Water Up the Stem
- Movement of Water Across the Leaf
- Movement of Water Through the Stomata
- Translocation
- Phloem Loading
All 18 lessons in Mass Transport in Plants · All OCR AS-level Biology topics