Chapter 11: Hunger, Sex, Friendship, Achievement Flashcards
motivation
a need or desire that energizes and directs a behavoiur
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
Yerkes-Dodson law
the principle that performance increases with arousal only up to a point, beyond which performance decreases
hierarchy of needs
Maslow’s pyramid of human needs, beginning with physiological needs that must first be satisfied 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 the level is low, we feel hunger
set point
the point at which your “weight thermostat” is supposedly set. when your body falls below this weight, increased hunger and a lowered metabolic rate may combine to restore the lost weight
basal metabolic rate
the body’s resting rate of energy expendature
asexual
having no sexual attraction to others
testosterone
the most important of the male sex hormones. Both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs during the fetal period, and the development of the male sex characteristics during puberty
estrogens
sex hormones, such as estradiol, secreted in greater amounts by females than by males and contributing to female sex characteristics. In nonhuman female mammals, estrogen levels peak during ovulation, prompting sexual receptivity
sexual response cycle
the four stages of sexual responding described by Masters and Johnson – excitement, plateau, orgasm, and resolution
refractory period
a resting period after orgasm, during which a man cannot achieve another orgasm