The table contains names and descriptions of processes involved in the human digestive system.
Complete the table by filling in the missing names (2, 3, and 5) and descriptions (1 and 4).
| Name of process | Description of process |
|---|---|
| Ingestion | (1) ........................................................................... |
| (2) ............................................... | the process where large, insoluble nutrients are broken down into small, soluble molecules |
| (3) ............................................... | digested food molecules move across the wall of the small intestine into the blood or lymph |
| Assimilation | (4) ........................................................................... |
| (5) ............................................... | the elimination of undigested materials from the body as faeces |
Describe the process of digestion in the stomach.
A student carried out some food tests on two samples of food, X and Y. The table below shows the results.
| Sample | Reagent used in food test | Colour seen after adding the reagent |
|---|---|---|
| X | Biuret reagent | purple |
| Y | iodine solution | blue-black |
The student concluded that both samples of food contained carbohydrates.
Do you agree with this conclusion? Give reasons for your answer.
