Newest BIOS 256 Midterm Exam Review packet

DIGESTIVE PROCESSES 1. Ingestion 2. Digestion (mechanical and chemical) 3. Motility (mixing and propulsion) 4. Secretion 5. Absorption 6. Defecation Ch. 24 GI TRACT AND ACCESSORY DIGESTIVE STRUCTURES BE ABLE TO IDENTIFY EACH ORGAN ON THE IMAGE ABOVE. GI TRACT INNERVATION  Autonomic NS o Parasympathetic NV (enhances digestion) o Sympathetic NV (inhibits or slows down digestion)  Enteric Nervous System o Submucosal plexus o Myenteric plexus Be able to identify all parts of the GI tract What are the histological significances of the GI tract? The GI tract consist of 4 layers: Mucosa- Divides into 3 layers Epithelium – Surface Epithelium Lamina Propria – Connective Tissue Muscularis Mucosae – Smooth Muscle Submucosa- Areolar Connective Tissue Muscularis- In all GI tract organs except the stomach Serosa