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Fill in the Blanks
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1

Gaps between myelinated segments of an axon are called .
2

The membrane-enclosed structures that secrete neurotransmitters are called .
3

When an action potential reaches the , neurotransmitters are released into the synaptic cleft.
4

The insulating substance that surrounds axons is called .
5

The small gap between the presynaptic neuron and postsynaptic cell is called the .
6

Neurons that have a single process leading away from the soma are .
7

Cells that produce cerebrospinal fluid are .
8

The division of the nervous system that prepares the body for extraordinary situations such as emergencies is the .





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