As neurons form connections, stimulation
A) becomes unnecessary.
B) results in fewer and fewer synapses.
C) becomes vital to their survival.
D) causes synaptic pruning.
C
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Eight-year-old Harvey has a mental age of four. What is his intelligence quotient?
a. 200 b. 150 c. 50 d. 32
Young people whose parents provided little sexual information
a. are atypical since most adolescents feel that they learned a lot about the topic from their parents. b. will feel guilty about their sexual curiosity. c. will turn elsewhere for information, thereby reducing the influence of their parents. d. feel satisfied with a low amount of parental interaction.
The functional units of heredity are
A. genes. B. neurotransmitters produced in the brain. C. phenotypes. D. basic chemical compounds that form the single helix of a DNA molecule.
The maturation of the ____ during adolescence lags behind the maturation of _____.
A. systems that are sensitive to reward; systems responsible for self-control B. systems responsible for self-control; systems that are sensitive to reward C. systems responsible for synaptic pruning; systems for myelination D. systems for myelination; systems responsible for synaptic pruning