Steve and Judy are chronic users of hallucinogens. They experience a recurrence of aspects of their drug experience without having taken the drug again in a phenomenon known as

Synchronized interactions between infants and their parents are important contributors to emotional attachment because

a. they create a routine. b. the infant likes to look at faces rather than other stimuli. c. they provide an opportunity for the infant to learn what his parent is like and how to attract his or her attention. d. such exchanges are innately pleasurable.

The major interior chamber of the eye is known as the _________ chamber

a. anterior b. aqueous c. vitreous d. macular