Unit 8 Flashcards
Instinct
complex behavior that is throughout species that is unlearned
drive-reduction theory
the idea that a physiological need creates an aroused drive that motivates an organism to satisfy the need
homeostasis
to maintain a balanced or constant internal state
incentives
positive or negative environmental stimulus that motivates behavior
yerkes-dodson law
performances increase with arousal only up to a point, beyond which performance decreases
hierarchy of needs
maslow’s pyramid of human needs
glucose
the form of sugar that circulates in the blood and provides the major source of energy for body tissue
insulin
hormones secreted by by pancreas; controls body glucose
ghrelin
hormone secreted by empty stomach; sends “I’m hungry” signals to the brain
orexin
Hunger-triggering hormone secreted by hypothalamus
leptin
protein hormone secreted by fat cells; causes brain to increase metabolism and decrease hunger
PYY
digestive tract hormone
set point
the point at which a person’s “weight thermostat” is supposedly set
basal metabolic rate
the body’s resting rate of energy expenditure
sexual response cycle
the four stages of sexual responding described by Master and Johnson excitement, plateau, orgasm, and resolution