Which of the following best describes free radicals?
A. The tiny gap between nerve cells across which neurotransmitters pass.
B. Specialized cell that supports, protects, or nourishes nerve cells.
C. By-products of oxygen metabolism.
D. Thick bundles of nerve cell fibers that connect the two cerebral hemispheres.
C. By-products of oxygen metabolism.
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The four models of first-order and higher-order (specifically, second-order) conditioning in Exercise 18 made differential predictions of the outcome when the UR was habituated in Stage 3. Which of the models predicted that, following such habituation, the CR to the tone (CSMT) and the CR to the light (CSML) both would no longer occur?
a. S-R, S-R b. S-R, S-S c. S-S, S-S d. S-S, S-R
What makes law enforcement particularly stressful is the
a. high demand approach-approach conflicts the officer is forced to face. b. amount of eustress that they must adapt to in a short period of time. c. unpredictable nature of the work. d. failure of their stress inoculation training in intense situations.
Based on the research to date, most psychologists would argue that personality is
a. solely determined by hereditary factors. b. solely the result of personal experiences. c. approximately 90 percent genetic and 10 percent environment. d. a combination of genetics and environment.
One of the reasons that Viagra has become so widely accepted as a treatment for erectile dysfunction is that
A. it is more effective than the other available treatments. B. it is less expensive than other medications, such as vasodilators. C. people are unaware of the other options. D. an oral medication is less awkward and intrusive than other treatments.