ch. 8 motivation and emotion Flashcards
motivation
biological, emotional, cognitive, and social forces that initiate and direct behavior
3 basic characteristics of motivation
activation, persistence, intensity
activation
initiation or production of behavior
persistence
continued efforts or determination to achieve goals in the face of obstacles
intensity
greater vigor of responding
instinct theories
people are motivated to engage in certain behaviors because of evolutionary programming, lacks explanatory power
drive theories
behavior is motivated by the desire to decrease internal tensions caused by unmet biological needs and detected by homeostasis mechanisms
incentive theories
behavior is motivated by the “pull” of external goals or rewards
arousal theory
very high and low arousal is unpleasant, people are motivated to maintain optimal arousal levels which vary from person to person
sensation seekers
need varied, complex, and unique sensory experiences, excitement seeking (not necessarily danger)
humanistic theories of motivation
people are innately motivated to realize their highest personal potential, could be jeopardized by the absence of a supportive environment
insulin
helps control blood glucose levels and promotes glucose uptake by body tissue cells
how much of the calories you intake are expended for daily physical activity vs. bodily functions
1/3 and 2/3
basal metabolic rate (BMR)
the rate at which the resting body uses energy for vital body functions
adipose tissue
body fat cells, stores extra energy
baseline body weight
average body weight, maintained by energy homeostasis
positive energy balance
eaten calories > expended calories -> extra energy is stored in fat and body weight increases
negative energy balance
eaten calories < expended calories -> use stored energy and body weight decreases
ghrelin
“hunger hormone” manufactured in stomach lining cells, rise sharply before and fall abruptly after meals, strongly stimulates appetite
satiation
“fullness,” the decreased desire to eat that follows eating
cholecystokinin (CCK)
hormone that stimulates stomach stretch receptors -> satiation
sensory-specific satiety
food becomes less appealing as you eat it, willingness to eat might return when presented with a different appealing food
leptin
hormone, secreted by adipose tissue, increase causes less food intake which decreases body fat causing leptin levels to decrease and food intake to increase, regulate energy homeostasis, amount correlates with the amount of adipose tissue, receptors in the hypothalamus
neuropeptide Y (NPY)
neurotransmitter, promoted by a decrease in leptin and insulin, triggers eating behaviors, reduces metabolism, promotes fat storage, activity decreases with weight gain