2.13d Active Transport

1. Active transport- molecules move from a low concentrated gradient to being accumulated in a high concentrated region. But to go against the concentration gradient, energy is needed to be applied.
2. The energy comes from respiration.
3. Cells doing active transport will have a high rate of respiration and they will be building up within the cell a high concentration of a particular molecule.
4. The root hair has a large surface area. They actively transport minerals and salts into the cells. They concentrate these into the cell creating a hig concentration region. This also encourages the uptake of water through osmosis into the cell.