Synaptic pruning
a. is a normal part of brain development
b. is associated with mental retardation, and results in too few connections.
c. results from insufficient amounts of neurotrophins.
d. results from excess amounts of neurotrophins.
a
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Ivan has discovered how to tame neurons and keep them as pets. When he's bored, he sometimes starts an action potential going down the axon of each of his four pet neurons, just to see which one will “win” by releasing neurotransmitters first. All of his neurons have axons of the exact same length. Ivan's game got old fast, though, because one neuron always wins. The winner is always ____.?
a. ?Sue, the neuron with the most dendrites b. ?Harry, the neuron with the fattest axon c. ?Elspeth, the neuron with the largest axon hillock d. ?Johann, the neuron with the most potassium channels
Where does the parasympathetic branch of the nervous system arise from?
A. the upper portion of the spinal cord B. the lower portion of the spinal cord C. both the upper and lower portions of the spinal cord D. the middle of the spinal cord
A reciprocal relationship, in that two children seek each other out and have positive feelings toward one another is
a. not voluntary. c. socialization. b. an interaction. d. a friendship.
Research has shown that in developing countries, ____________ are more likely to experience emerging adulthood
a. young people in urban areas b. females c. young people from divorced families d. young people who are true to their traditional heritage