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Chapter 11
Neurons
17
Anatomy
12th Grade
03/21/2010

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Term
Neuron
Definition
General term given to cells that conduct impulses
Term
Neuroglia
Definition
Type of nerve tissue that supports and maintains neuronal structure and function
Term
Dendrites
Definition
Extensions conducting impulses to the cell body of neurons
Term
Microglia
Definition
Type of neuroglia which destroy invading microorganisms
Term
Axon
Definition
Fiber conducting impulses away from the cell body of neurons
Term
Motor
Definition
The neurons that carry impulses from the CNS to hand muscles, allowing movement
Term
Synapse
Definition
The junction between adjacent neurons through which the impulse must pass
Term
Myelin sheath
Definition
White, fatty insulating barrier found on neurons
Term
Ependymal cells
Definition
Type of neurglia that helpd to form cerebrospinal fluid
Term
Schwann cells
Definition
Type of neuroglia that provide insulating coverings around large PNS axons
Term
Astrocytes
Definition
Type of neuroglial which anchors neurons to blood capillaries
Term
Oligodendrocytes
Definition
Type of neuroglial which form mylein sheath in CNS
Term
Nissi Bodies
Definition
Membranous sacs found in neurons, similar to RER
Term
True
Definition
The autonomic nervous system is involuntary
Term
Sympathetic
Definition
Subdivision of the PNS  that plays an active role during conditions of stress (freeze, fight, flight)
Term
Parasympathetic
Definition
Subdivision of the PNS that functions during normal organ operation (rest and repair)
Term
Sensory input, integregation, motor output
Definition
3 functions of the nervous system
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