6 3
This question is about digestion. (a) Food molecules need to be digested. Explain why. ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [2] (b) The lining of the stomach makes a liquid called gastric juice. This contains protease, hydrochloric acid and mucus.
stomach wall containing glandular cells and muscle cells formed largely of protein
food particle gastric juice stomach
cells make mucus which lines the inside of the stomach
cells make hydrochloric acid
cells make protease
Š OCR 2014