| Column I | Column II | Column III |
| Goblet cells | Mucus | Prevents mucous layer damage from HCl |
| Lysozyme | Saliva | Antibacterial agent |
| Parotid gland | Tears | Destroys bacteria |
| Oxyntic cells | HCl | Stimulates gastric juice |
| Column I (Hormone) | Column II (Secreted by) | Column III (Function) |
| Gastrin | a. Small intestine | (i) Stimulates pancreas to produce water and bicarbonates. |
| Enterogasterone | b. Stomach | (ii) Stimulates the gastric gland to produce gastric juice |
| Cholecystokinin | c. Duodenum | (iii) Inhibits the secretion of gastric juice. |
| Secretin | d. Duodenum and jejunum | (iv) Stimulates the release of intestinal juices by intestinal glands. |
| GIP | e. Jejunum and ileum | (v) Contracts the gall bladder to release bile. |
| Enterokinin | - - - - | - - - - |