Luigi Galvani removed a nerve and its attached muscle fibers from a frog and showed that __________ of the nerve caused __________ of the muscle.
A. electrical stimulation; relaxation
B. electrical stimulation; contraction
C. chemical stimulation; contraction
D. chemical stimulation; relaxation
Answer: B
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Which hypothesis offers an explanation for why psychopaths often do not respond normally to punishment?
a. They are preoccupied with the potential for a successful outcome. b. They have never been punished. c. They have been punished too often. d. They lack the necessary cognitive skills to understand punishment.
Which statement regarding testosterone levels in men is MOST accurate?
a. They usually dip after men reach their early twenties. b. They are usually constant throughout life. c. They do not appear to be associated with sex drive. d. They do not appear to be associated with risk-taking behavior.
The sleep/wake shift involves
a. many adolescents switching to sleeping during the day rather than the night. b. increased sleepiness both during the day and at night among many adolescents. c. decreased sleepiness both during the day and at night among many adolescents. d. increased sleepiness during the day and decreased sleepiness at night among many adolescents.
Using ______, behavior geneticists deliberately modify the genetic makeup of animals to examine the influence of heredity on attributes and behavior.
A. research on twins B. selective breeding studies C. family studies D. heritability estimates