A neuron may produce another action potential in response to larger than normal depolarization during the
A. absolute refractory period.
B. relative refractory period.
C. depolarization phase of the action potential.
D. hyperpolarization phase of an action potential.
Answer: B
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What is one reason that early reports of the effectiveness of psychosurgery were quite positive?
a) The low rate of success of psychoanalytic therapy made any treatment, even an ineffective one, seem good by comparison. b) The evaluations were often done by the surgeons themselves, who were impressed by reports from patients who were under local anesthesia. c) Family members were the primary source of such evaluations; they were often enthusiastic about the positive changes they observed in loved ones. d) Most of these patients were actually receiving psychotherapy and drug treatments simultaneously; thus there is no way to determine which treatment was responsible for any improvements.
Which of the following hormones is released from the pituitary gland and plays a broad role in regulating many
. behaviors generally involved in happiness, including pregnancy, parenthood, sexual activity, social bonding, trust, and the reduction of stress reactions? a. melatonin b. oxytocin c. corticoids d. androgens
Over coffee, 48-year-old Wendy shares her concerns about her daughter with her closest friend: "Kayla still hasn't gotten her period. I'm wondering whether to make an appointment with her doctor."Her friend Latisha replies, "Not everyone starts the same time. Kayla's 14, right? My Aisha started menstruating at 10. Boy, was that a shock! I think I'd rather that she began a little later than earlier.Wendy: "You're probably right. I just don't want her to feel left out. I started at about 12. I wonder why she's late."Latisha: "Well, one thing about having teenage girls is they make you feel your age! Or maybe it's the hot flashes."Wendy chuckles, "I thought that was just me."Discuss influences on pubertal timing. Should Wendy expect her daughter to show similar pubertal timing?
What will be an ideal response?
Recent research suggests that the tendency to smoke may be controlled in part by
a) baseline levels of serotonin. b) a gene that regulates the reuptake of dopamine. c) a deficiency in dopamine. d) a brain area that regulates both serotonin and dopamine.