Ch. 13 - Nervous Tissue Flashcards
The CNS contains the
brain and spinal cord
The PNS contains the
nerves and ganglia
knot-swelling in a nerve containing neurosoma
Ganglia
PNS is divided into these 2 regions
sensory and motor divisions
Both the sensory and motor divisions of the PNS are further divided into these 2 sections
visceral and somatic divisions
Sensory division is AKA
Afferent division
the visceral division is AKA
autonomic division
the autonomic system has 2 further divisions
sympathetic and parasympathetic
functional subunit of the nervous system
neuron
3 classes or neurons
afferent (sensory)
interneurons
efferent (motor)
can a neuron have more than one axon?
no
4 types of glial cells in the CNS
OEMA
oligodendrocytes
ependymal cells
microglia
astrocytes
2 types of glial cells in the PNS
SS
schwann cells
satellite cells
this part of a neuron receives information
dendrite
the spinal cord extends from these spinal locations
C1-L1
the spinal cord gives rise to this many spinal nerves
31
each pair of spinal nerves is called a
segment
the spinal cord widens at 2 points
cervical enlargement
lumbosacral enlargement
the cauda equina runs from these spinal locations
L2-S5
site of information processing/synaptic integration
gray matter
the dorsal/ventral root carries sensory nerve fibers
dorsal
the dorsal/ventral root carries motor nerve fibers
ventral
the bundles of myelinated axons in the spinal white matter are arranged in 3 pairs called
funiculi
(posterior, lateral, and anterior)
this means that the tract crosses over from one side of the body to the other
decussation
5 nerve plexuses
cervical
brachial
lumbar
sacral
coccygeal
