Final answer:
The cephalic phase is activated by the taste, smell, or thought of food, leading to the production of gastric secretions in anticipation of food digestion.
Step-by-step explanation:
The taste, smell, or thought of food stimulates gastric secretions by activating the cephalic phase of gastric regulation. The cephalic phase is a neural response triggered by various stimuli such as sight, sense, and smell of food, which leads to salivation and secretion of gastric juices. This phase prepares the stomach for the incoming food and is influenced by the individual's desire for that particular food since this enhanced secretion is a conditioned reflex.