Unit 8: Motivation and Emotion Flashcards
Motivation
a need or desire that energizes and directs behavior
Instinct
a complex behaviour that is rigidly patterned throughout a species and is unlearned
Drive-reduction theory
the idea that a physiological need creates an aroused tension state (a drive) that motivates an organism to satisfy the need
Homeostasis
a tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry; such as blood glucose, around a particular level
Incentive
a positive or negative environmental stimulus that motivates behaviour
Maslows hierarchy of needs
Begins at the base of physiological needs before higher-level safety needs and then psychological needs become active
Glucose
the form of sugar that circulates in the blood and provides the major source of energy for body tissues. When it is low, we feel hunger.
Insulin
a hormone secreted by the pancreas; it controls blood glucose
Lateral hypothalamus
the sides of the hypothalamus that bring on hunger
Ventromedial hypothalamus
the lower-mid hypothalamus that depressed hunger
Ghrelin hormone
secreted by an empty stomach; sends “I’m hungry” to the brain
Obestatin hormone
secreted by stomach; tells brain “I’m full”
Leptin hormone
secreted by fat cells, when abundant, causes brain to increase metabolism and decrease hunger
Set point
the point at which an individual’s “weight thermostat” is supposedly set. When the body falls below this weight, an increase in hunger and a lower metabolic rate may act to restore the lost weight.
Basal metabolic weight
the body’s resting rate of energy expenditure
Anorexia nervosa
an eating disorder in which a person diets and becomes significantly (15% or more) underweight, yet, still feeling fat, continues to starve
Bulimia nervosa
an eating disorder characterized by episodes of overeating, usually high calorie foods, followed by vomiting, laxative use, fasting, or excessive excercise
Binge eating disorder
significant binge-eating episodes, followed by distress, disgust, or guilt, but without the compensatory purging, fasting, or excessive exercise that marks bulimia nervosa
Fat cells
30 to 40 billion
Can swell to 3 times their size
Can increase in number, but never decrease in number
Fat
Has a low metabolic rate
Sexual response cycle
the four stages of sexual responding described by Masters and Johnson — excitement, plateau, orgasm and resolution