Concerning cocaine use, which of the following statements is FALSE?
a. If cocaine were cheaper, nine out of 10 users would progress to compulsive abuse.
b. The brain adapts to cocaine abuse in ways that upset its chemical balance, causing depression when cocaine is withdrawn.
c. Cocaine significantly decreases the chemical messengers dopamine and noradrenaline.
d. A vaccine that prevents cocaine from stimulating the nervous system is currently undergoing clinical trials.
C
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In a neuron, what happens when an action potential reaches the axon terminals of the neuron?
A) Because neurons touch one another, the action potential simply travels to an adjoining neuron. B) The action potential stimulates the release of chemical substances. C) The impulse changes direction, heading back to the cell body. D) An electrical spark forms, which may jump to other neurons.
Rogers emphasized that to maximize our potentials, we must
a. block, deny, or distort experiences that are threatening to our self-image. b. experience conditions of worth. c. be true to ourselves even if we have to ignore the feelings of others. d. accept information about ourselves as honestly as possible.
Which of the following best describes changes to attention and memory in late adulthood?
a. decline to some degree b. decline to a vast degree c. increase to some degree d. increase to a vast degree
A number of factors influence the distance a car travels before stopping when the brakes are applied, including initial speed of the car, the slope of the roadway, the car’s tire tread, and the roughness of the roadway. Suppose Ginny, a five-year-old child, is given a series of problems in which she is asked to predict which of two cars will travel the greatest distance before stopping when the brakes are applied. When solving such problems, Ginny is likely to ___.
a. consistently predict that the car with the greatest initial speed will travel farthest b. consider both initial speed and tire tread when predicting which car will travel farthest c. haphazardly guess which car will travel farthest on each problem d. consider all of the relevant dimensions when predicting which car will travel farthest