Final answer:
The correct order of gastric secretion phases is the cephalic phase, gastric phase, and then the intestinal phase.
Step-by-step explanation:
The phases of gastric secretion, from first to last, are cephalic phase, gastric phase, intestinal phase. The cephalic phase is the initial phase of gastric secretion that occurs before food enters the stomach, driven by neural responses to the sight, smell, or thought of food. The gastric phase begins once the food arrives in the stomach and is marked by secretions and contractions in response to the distension of the stomach, a decrease in the pH, and the presence of undigested materials. Lastly, the intestinal phase is initiated by the entry of chyme into the small intestine. All these phases work together to effectively digest food.