What do researchers currently say about the role of genetics in obesity?
a. Many genes make a small contribution to the probability of obesity
b. No genes make any measurable contribution to the probability of obesity.
c. One dominant gene on the X chromosome is responsible for almost 25 percent of obesity.
d. One recessive gene is responsible for almost 25 percent of obesity.
a
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According to some researchers, the reason studies don't always find a relationship between Type A behavior and health problems may be that
A. only some of the behaviors within the Type A pattern are related to health problems. B. researchers are doing a better job of measuring Type A today. C. people have become aware of the causes of heart attacks in recent years and have taken actions to prevent them. D. people today are working to reduce stress in their lives.
The process by which nerve impulses are conducted down an axon by jumping from gap to gap in the myelin layer is known as
a. neuroplasticity. b. synaptic transmission. c. saltatory conduction. d. positive after-potential.
A child who is in Freud's latency stage is most likely to
a. be three years old. b. struggle with toilet-training. c. experience jealousy. d. be co-dependent. e. learn modesty.
The rays of light focused on the eyes are converted into electrical impulses by the
A. cornea. B. iris. C. retina. D. cochlea.