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Test: GRE Subject Test: Psychology
1. | Glial cells are located in the nervous system and perform which of the following functions? |
They work as a kind of sheath to improve the efficiency of electrical impulses
They break down dead neural pathways as part of the pruning process that takes place in the brain when connections between synapses are not used
They are a type of parasite that live off of neurons and can cause substantial damage to the brain
They support, nourish, and protect neurons; they may also play a role in learning and thinking
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