PS102 Lecture Notes - Body Mass Index, Libido, Antidiuretic
Document Summary
Drives: directed, make us driven make us act. How do we direct that behaviour: self-regulation, homeostatis stable internal equilibrium temperature control reflective, involuntary supplement, voluntary behaviours. Primary drive stems from unlearned motives to satisfy biological needs. Satisfied through : reflexive compensatory mechanisms, couples with directed behaviour. Extracuricullar thirst: occurs when body tissues lose fluids, such as when one perspires while exercising. Intracellular thirst: occurs when body cells lose water, such as when one eats salty foods. Internal cues motivate hunger by stimulating the hypothalamus in the brain, receptors from stomach and intestines and liver. External cues motivate hunger when we see, smell or taste foods that we like. Measures amount of glucose available for metabolic consumption. Leptin hormone produced by fat cells. Learning schedules for eating expected meal times, others will influence what we eat. Eating problems: too much or too little of a good thing. 20% above the average weight for a given height.
