PSYCH 111 Lecture Notes - Lecture 6: Blood Pressure, Duodenum, Plasma Osmolality
Document Summary
Biological motives: hunger, thirst, sex, maintain temperatures, excrete waste, maintain medium arousal. Social motives: achieve, bond, be autonomous, establish dominance, express oneself, learn. Homeostatic motivation: designed to maintain some sort of steady state. Hypothalamus shares some cells with the pituitary glands. The nervous system and endocrine systems are specialized for command-and-control of our bodies: essentially about keeping us alive. Through meditation, you can get control of your inner temperature. Hydration: blood plasma volume amount of liquid part of our blood. Triggers thirst: blood plasma osmolality density of other solutes present in the blood. Too much solute, drink more water to thin it out: blood pressure, pregnancy. Command-and-control systems have a computational structure analytically distinct from their partially redundant biological implementation. Inborn predisposition to certain foods that contain high fat and simple sugars. Regional types of foods eaten in certain locations. Glucose sensors brain steam & hypothalamus. Nutrient sensors liver & stomach & small. Satiety: stretch sensors stomach & intestine.
