SC-1487
Transport in plants and humans
Lower Sec Science · Secondary 2 · Medium · Transport in plants and humans
A food sample contains starch, protein and fat. It enters the mouth and then passes down the oesophagus (gullet). Why does the amount of starch decrease in the gullet even though no enzymes are produced there?
- Salivary amylase from the mouth continues to digest starch as food moves through the gullet.
- New starch is produced in the gullet, so the amount seems to decrease.
- Starch is absorbed into the blood through the walls of the gullet.
- Starch is converted into fat by the muscles of the gullet.
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