Question

Answer the following question.

Define and or explain the term:

Active absorption

Answer 1

1. In this water is absorbed due to the activity of roots.
2. Root cells play an active role in the absorption of water.
3. The driving force is the root pressure developed, in the living cells of the root.
4. Active absorption occurs usually at night when transpiration stops due to the closure of stomata.
5. As water absorption is against the DPD gradient, there is an expenditure of ATP (energy) generated through the respiratory activity of cells.