PSYC 370 Lecture Notes - Lecture 10: Biological Specificity, Classical Conditioning, Adipose Tissue

• School: Queen's University
• Department: Psychology
• Course: PSYC 370
• Professor: Janet L Menard

Document Summary

Purpose of hunger is to increase the probability of eating. Purpose of eating is to supply body with the molecular building blocks and energy it needs to survive & function. Digestive system- modified tube with specialized structures: converts food to usable nutrients & energy. Digestion- gastrointestinal process of breaking down food into forms into usable nutrients and energy: stomach collects food, breaks it down, and releases it into small intestine, food moves through the system via peristalsis. Energy is delivered to the body as lipids, amino acids, and glucose: carbohydrates glucose (critical fuel for the brain, fats fatty acids (long-term energy storage, proteins amino acids (used to build up more proteins) Fasting phase- all the unstored energy from previous meal has been used and body is withdrawing energy from reserves to meet immediate energy needs: begins when blood levels of glucose drop; this signals the pancreas to: Gamma cell (make up 1% of islets of langerhans cells)- release polypeptide hormone.