What type of genes previously functioned normally but now produce abnormal cell duplication?
a. stability genes
b. oncogenes
c. tumor suppressor genes
d. cancer genes
Answer: B
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Situations involving conflict trigger feelings of stress, because:
A. the situation is appraised as challenging B. only people with an external locus of control experience conflict C. one choice or goal must be given up D. they are usually accompanied by many major life changes
The proteins PER and TIM, originally discovered in insect but now found in mammals also, influence circadian rhythms by ____
a. building up during the day and declining during sleep b. being transformed into melatonin c. stimulating and inhibiting (respectively) the release of acetylcholine in the cerebral cortex d. providing negative feedback from the muscles to the neurons that innervate them
Which of the following activities has been associated with white matter abnormalities in the brain?
A. one-time loss of consciousness due to a fall B. repeated heading of the ball in soccer C. one concussion that does not result in a loss of consciousness D. a mild traumatic brain injury resulting from a rugby match
In the text, the authors report that a person's popularity with peers is determined by multiple factors, including social skills, age at puberty, and academic achievement. This illustrates the concept of
a. holistic development. b. cumulative development. c. continuous development. d. plasticity.