One reason for increased coordination and agility during the middle childhood years is:
a. practice using physical skills. c. increased muscle strength.
b. increased myelination of motor pathways. d. all of these.
D
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According to the trichromatic theory of color vision ____
a. there are only three rods and three cones in each eye b. there are only three colors of light in the world c. rods are important for perception of light colors d. our perception of color depends on the relative activity of three types of cones
The drug Ecstasy (also called MDMA) is classified as which of the following?
a. a stimulant b. a depressant c. a hallucinogen d. an opiate
The diathesis–stress model explains disease as the result of:
A) a predisposition for a disease and a triggering event. B) a triggering event such as stress. C) a predisposition for a disease. D) biological, psychological, and social factors that all interact.
In what stage do sexual desires resurface and become renewed?
a. genital c. latency b. phallic d. oral