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nervous sytem (peripheral nervous system (cranial nerves (nerve (axon,…
nervous sytem
peripheral nervous system
neuroglia
Schwan cells
myelin sheath
wrap around axon
insulates
speeds up electrical impulses
satellite cells
structural support
helps regulate what enters and leaves neuron cell body
cranial nerves
nerves to and from brain
nerve
axon
myelin sheath
endonerium
areolar C.T
perineurium
fibrous C.T.
fasicles
blood vessels
efferent(motor)
visceral motor fiber
muscle
smooth muscle
contraction
cardiac muscle
glands
exocrine glands
secrete substances onto body surface
endocrine glands
secrete hormones into bloodstream
somatic motor fiber
skeletal muscle
spinal nerves
ganglia
cluster of cell bodies
near spinal cord
carry signals from receptors to cns
nerves to and from spinal cord
afferent(sensory)
somatic sensory fiber
sensory receptor
respond to stimuli
free nerve endings
specialized sensory cells
Exteroceptors
sensitive to stimuli from environment
skin
mechanoreceptors
6 more items...
thermoreceptors
1 more item...
special senses
photoreceptors
2 more items...
send signals to cns
axon
proprioceptors
sensitive to stretch
muscles
tendons
balance and body orientation
ligaments
skin
general
touch
pain
skin
limbs
body wall
pressure
vibration
temp
proprioceptors
special
hearing
equalibrium
balance
vision
visceral sensory
general
stretch
baroreceptors
pain
nociceptors
viscera
nausea
hunger
temperature
chemoreceptors
irritation
visceral sensory fiber
unipolar
special senses
taste
chemoreceptors
smell
bipolar
serves as communication lines
links all regions of the body to Central nervous system
Central nervous system
brain
neuroglia
astrocyte
most abundant
processes wrap
axons
capillaries
regulate neurotransmitter levels
largest
signal increase bloodflow
control ion environment around neuron
microglia
phagocytes
mobile
look for invaders
engulf them
clean debris
ependymal cells
simple cuboidal/columnar epithelium
line
spinal cord
central canal
brain
ventricles
permeable layer
between brain
oligodendrocyte
wrap
axons in cns
which are thicker
form myelin sheath
many processes
Grey matter
unmyelinated
soma
dendrites
cortex
nucleus
cluster of neurons in brain
deep grey matter
white matter
myelinated
tract
spinal cord
recieves incoming signals
interprets signals
past experiences
makes decision
current conditions
reflexes
via sensory receptors
afferent
sensory input
integration
processes information
motor output
after intergration
"the response"