The table lists some structures that provide specialized surfaces for the exchange or uptake of substances.
Complete the table by naming the organ in which each structure is found. The first one has been done for you.
| Structure | Organ |
|---|---|
| guard cell | leaf |
| alveolus | |
| villus | |
| root hair |
What is meant by the term active transport?
The root hair cell is involved in the uptake of mineral ions from the soil.
Describe how mineral ions are absorbed from the soil into the root hair cell when they are in low concentration in the soil.
23 exam-style questions on Edexcel IGCSE Biology Movement of substances into and out of cells. Each one has a worked solution and a mark scheme showing where the marks go.