chpt 16: nervous tissue Flashcards
what NS structure creates ap which goes into the CNS to create perception and is considered a bundle of axons
nerves
ganglia def
- nerves outside the cns
- contain cell bodies
what is considered the brain of the gut
enteric plexuses
enteric plexuses location
walls of GI tract organs
enteric plexuses function
help regulate digestive sys activates
what are specialized nerve endings
- sensory receptors
3 functions of the ns
sensory, integrative, and motor
what is the voluntary part of the PNS
somatic NS
autonomic ns is
the involuntary par of the pns
breakdown of the ANS
sympathetic and parasympathetic ns
do neurons regenerate
no
neuroglia structure
smaller than neurons
- can divide/ regenerate
what is contributes to the size of the CNS
neuroglia
what is the receiving/ input zone of a neuron
dendrite
cell bodies aka perikaryon function
- proteins synthesis
trigger zone of ap location
axon hillock
the axon of a neuron is
- output zone
- takes ap away
Nissl bodies function
- proteins synthesis
lipofuscin location
cytoplasm of neuron cell body
what is the pigment in neurons
lipofuscin, clumps of yellow- brown granules
types of neuroglia in the CNS
- astrocytes (protoplasmic and fibrous)
- oligodendrocytes
- ependymal cells
- microglia
which astrocyte is the grey mater
protoplasmic
what do the fibrous astrocytes come in contact with
- bv
- neurons
- pia mater
what causes axons regeneration in PNS
Schwann cells
