The 'cephalic phase' of gastric secretion is triggered by the sight, smell, or thought of food. Which cranial nerve is responsible for transmitting these parasympathetic signals to the stomach?
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Correct answer: Vagus (X)
The Vagus nerve provides the primary parasympathetic innervation to the upper gastrointestinal tract. During the cephalic phase, vagal stimulation increases the activity of parietal and chief cells before food even reaches the stomach.
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