The behavioral and physiological effects of a drug are most directly related to
a. the concentration of the drug in the body.
b. the dose of the drug.
c. the number of pills consumed.
d. the size of the tablet containing the active ingredient.
e. the concentration of the vehicle.
Answer: A
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In which of Piaget's substages of his sensorimotor stage do infants begin to coordinate what were separate actions into single, integrated activities?
a) secondary circular reactions b) simple reflexes c) tertiary circular reactions d) first habits and primary circular reactions
Babies of mothers who smoked heavily during pregnancy do NOT show which of the following characteristics?
a. being overweight b. having lower scores on tests of language and mental ability c. being more likely to be miscarried or to die soon after birth d. receiving significantly less oxygen during prenatal development