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somatic sensory
skin, joints, skeletal muscles, special senses
visceral sensory
viscera
somatic motor
“voluntary”
skeletal muscle
autonomic motor
“involuntary”
cardiac muscle
smooth muscle
glands
neurons
excitable cells that transmit nerve impulses
glial cells
non-excitable cells that support and protect the neurons
neuron characteristics
high metabolic rate
longevity
nonmitotic
unipolar neurons
sensory neurons
bipolar neurons
special senses
uncommon
multipolar neurons
most common
motor neurons
interneurons
cell bodies
PNS: ganglia
CNS: gray matter
axons
PNS: nerves
CNS: white matter
astrocyte
control ionic environment
BBB
oligodendrocyte
form myelin sheaths in CNS
microglial cell
macrophages of CNS
ependymal cells
line brain ventricles
satellite cell
protects and regulates nutrients for cells bodies and ganglia
schwann cell
myelinates PNS axons
myelin sheath structure
made by oligodendrocytes in the CNS
Shwann cells in the PNS
white fatty coating
myelin sheath function
supports, protects, and insulates axon
increases speed on conduction
nerves
cable-like bundle of parallel axons
3 connective tissue wrapping
synapses function
sit where neurons communicate with other neurons, muscles, or glands
synapses structure
presynaptic neuron
synaptic cleft
postsynaptic neuron
regeneration?
PNS: potential
CNS: very limited
Note 
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