CHEM 1001 Lecture Notes - Medulla Oblongata, Trypsin, Chyme

• School: Carleton University
• Department: Chemistry
• Course: CHEM 1001
• Professor: Amanda Helleman

Document Summary

Nervous and hormonal control of salivary, gastric and pancreatic secretions. Mammal has 2 communication systems nervous and endocrine system. Nervous system is based on electrical impulses passing along nerve cells: short-lasting effects, can be switched on or off rapidly, secretes salvia when food enters mouth. Endocrine system is based on hormones: travel in blood to target organ, produce long-lasting effects, trigger secretion of bile and pancreatic juice. Importance of simple and conditioned reflexes and the. Nerve pathway involving small number of nerve cells (2/3) rapid response. Automatic response particular stimulus has same effect. By various stimuli associated with food (smell/sight/sound) By contact of substances in food with taste buds on tongue. Secreted in response to presence of food in particular region of gut. Hormones travel in blood to glands / in glands, stimulate secretion of digestive juices. Gastrin stimulates exocrine glands in stomach to release gastric juice.