Exam (elaborations) BIOS 256 Week 3 Lab ( Review of Mechanical Digestion in Gastrointestinal Tract)

Review of Mechanical Digestion in the Gastrointestinal Tract Introduction 1. Define the gastrointestinal tract (GI). The gastrointestinal tract is a muscular tube that extends from the mouth to the anus. It contains food and processes it as it moves through the mouth to the anus. 2. Identify three mechanical digestion activities. a. mixing and moving of food through the digestive tract b. elimination of waste c. chewing and swallowing of food 3. Name two feedback loops that regulate digestive system smooth muscle responsible for propulsive and mixing movements. Hormonal feedback loops and neural feedback neural 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. NS local reflexes 5. Describe the role of the CNS with regard to swallowing. What is the stimulus? It controls the voluntary movements of swallowing. The stimulus is the presence of food for the voluntary digestive movement