Summary Gastrointenstinal Tract Summarized.

Gastrointenstinal Tract Summarized. Directions: a. Click the Contents button. b. Open the Digestive System File. c. Click Animations. d. Click Mechanical Digestion in the Gastrointestinal Tract. I n t r o d u c t i o n 1. Define the gastrointestinal tract (GI). A continues tube from the mouth to the anus. 2. Identify three mechanical digestion activities. a. chewing (mastification), turning food into bolus b. with help of mixing food with saliva c. churning of the food in the stomach and segmentation of the intestines 3. Name two feedback loops that regulate digestive system smooth muscle responsible for propulsive and mixing movements. Hormonal feedback loops and neural feedback loops Neural Regulation of Mechanical Digestion 4. Identify three neural systems that control the mechanical movements in the GI tract. a. CNS b. ANS (long) reflexes c. ENS (local) reflexes 5. Describe the role of the CNS with regard to swallowing. What is the stimulus? Controls voluntary swallowing movements. The presence of food is the stimulus for voluntary digestive movements. 6. a. What are the components of the ANS (long) neural reflexes? CNS control center is the spinal cord or the brain. ANS neurons regulate involuntary smooth muscle