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The Digestive System

The Digestive System

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Cephalic phase: involves special senses detect food and uses parasympathetic nerves in the vagus nerve to stimulate gastric activities. 1. Sight, Smell , and Taste of food cause stimulation of vagus nuclei in brain. 2. Vagus stimulates acid secretion. a. Direct stimulation of parietal cells (major effect). b.

  Food, Acid

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