The opioid antagonist naltrexone can prevent heroin from having its normal effect if it is injected
Indicate whether the statement is true or false
True
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Which of the following students provides one of the valid explanations for gender differences in life expectancy?
a. Sadie: "Most researchers focus on the possibility that the X chromosome and female hormones protect women against health problems.". b. Bessie: "Women live longer because they are much less likely to be overweight.". c. Kate: "Women actually experience about half as many serious illnesses as men do.". d. Rosa: "Women visit their health-care providers more often than men do.".
What is one characteristic of a useful theory?
a. They allow us to eliminate conflicting ideas. b. They are broad enough to be true for all humans. c. They enable laypersons to codify behavior. d. They allow us to make predictions.
Following up on the preceding question, suppose that you found that 27 of the new hires were women. You would probably be justified in concluding that
a. there was discrimination against men. b. there was discrimination against women. c. there was no discrimination on the basis of gender. d. we don't have enough information to even start to answer the question.
If the unconditioned stimulus is presented before the neutral stimulus it is referred to as ____________ conditioning
a. backward b. forward c. delay d. trace