Neuromodulators __________.
A. have a lipid structure
B. directly elicit postsynaptic potentials
C. are usually found in small dense-core vesicles in terminal buttons
D. diffuse widely to affect many neurons
Answer: D
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Under what circumstances will the distribution of sample means be normal?
a. It is always normal b. Only if the population distribution is normal c. Only if the sample size is greater than 30 d. If the population is normal or if the sample size is greater than 30
Researchers typically try to ____
a. increase the differences between treatments and decrease the variance within treatments b. decrease the differences between treatments and increase the variance within treatments c. increase the differences between treatments and increase the variance within treatments d. decrease the differences between treatments and decrease the variance within treatments
A variable ratio schedule is best described as providing reinforcement after
a. a specific number of correct responses have been made. b. any number of correct responses has been made. c. unpredictable intervals. d. enough time passes.
Christa and Sal are anticipating the birth of their first baby. Before the baby arrives, they want to fix up the nursery with new wallpaper. They seek the advice of a developmental psychologist. What is she likely to tell them?
a) Newborns prefer to look at faces rather than objects. b) Newborns prefer to look at animals rather than people. c) Newborns do not see well enough to make any difference. d) Newborns prefer to look at simple rather than complex patterns.