Psychology 1000 Lecture Notes - Human Sexual Response Cycle, Sexual Fantasy, Prenatal Hormones And Sexual Orientation

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Terry Biggs

Document Summary

Adaptive significance: we are motivated to engage in behavior that. Physiological disruptions to homeostasis produce drives to behave in a promotes survival advantages. Drive theory (hull, 1943, 1951) certain way (e. g. , thirst influences drinking) Goal-directed behavior is jointly determined by expectation that behavior will lead to a goal and the value the individual places on the goal (incentive value) Performing an activity to obtain an external reward or avoid. Performing an activity because you find it enjoyable or stimulating. Decreases in blood glucose levels are detected by liver sensors, which convert stored nutrients back into glucose. Drop-rise pattern may be a signal of hunger to the brain. Peptides sent into bloodstream as food arrives in intestines from the stomach. Leptin: a hormone in the fat cells that decreases appetite (halaas et al. , Lateral hypothalamus (lh) - may be involved in stimulating eating, but it is not a hunger on center.