The lining of the small intestine loses cells from its surface each day. Adult stem cells in the lining produce replacement cells.
A medicine affects the production of replacement cells. The table shows data for one small area of the lining.
| Condition | Cells lost each day | Replacement cells produced each day |
|---|---|---|
| Before treatment | 240 | 240 |
| During treatment | 240 | 150 |
Describe how the adult stem cells normally produce specialised cells for the lining and use the data to describe what will happen to the lining during treatment.
194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.