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The human central nervous system:
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Begins to form when the embryo is about two weeks old.-
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What is migration?
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the movement of primitive neurons and glia within the developing nervous system?
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What is differentiation?
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Formation of dendrites and an axon.
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What is proliferation?
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The production of new cells
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Whether or not a transplanted neuron develops characteristics similar to its new neighbors is dependent upon the:
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Maturity of the transplanted neurons
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Why is it that all neurons in a healthy adult brain have made appropriate connections?
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F an axon does not make the appropriate connections by a certain age, it dies.
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Apoptosis:
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Is a programmed mechanism of cell death.
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At later stages of the neuron's development, neurotrophins:
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Increase the branching of axons.
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If you cut the optic nerve of a newt, what happens?
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The fibers grow back and attach to their original targets, resulting in normal vision.
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What is different about rats raised in an enriched environment in comparison to rats raised in an impoverished environment?
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Improved learning performance
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If Himalayan anteaters have a larger cerebral cortex than Mongolian anteaters, then probably:
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Himalayan anteaters also have larger subcortical areas.
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Children of mothers who smoke cigarettes during pregnancy are at an increased risk of:
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Intellectual deficits.
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A stroke which is caused when an artery ruptures is also known as:
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Hemorrhage
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Ischemia is to __________ as hemorrhage is to __________ :
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Obstruction; rupture
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Recovery from brain damage:
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Becomes more difficult in old age.
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