Which of the following best describes the process of synaptic pruning?
A. All neurons developed in utero are deleted at birth and replaced by new neurons during the first two years of life.
B. Frequently used neurons are deleted during adolescents to make way for neurons responsible for adult-level cognition.
C. Infrequently used synapses are deleted at various points throughout development, particularly during early development.
D. All synapses are deleted around age two and replaced by new synapses that allow for more complex cognitive abilities.
Answer: C
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Glutamate is an excitatory neurotransmitter that researchers suspect might be involved in schizophrenia because __________.
A. it makes dopamine B. it causes the ventricles to enlarge C. it is missing in the brains of people with schizophrenia D. alterations in glutamate levels can produce schizophrenic-like symptoms in normal subjects
If a correlation coefficient has a positive sign, it indicates that:
a. the two factors being measured move in opposite directions b. the two factors being measured move in the same direction c. there is no relationship between the two factors being measured d. there is a significant relationship between the two factors being measured
Male rats have more motor neurons in a structure known as the SNB than do female rats likely because the SNB is responsible for
A. controlling the muscles of the rat's penis. B. parenting behaviors in male animals. C. the production of sperm. D. the production of testosterone.
The process by which children learn the behaviors and attitudes appropriate to their family, friends, and culture is called ______
a. autonomy c. attachment b. imprinting d. socialization