Neural Tissue Flashcards
The ___ includes cranial nerves and spinal nerves.
PNS
division of the nervous system protected by bone
CNS
ascending tracts in the spinal cord carry ____ information
sensory
The ___ controls automatic visceral functions.
ANS (autonomic nervous system)
neural tissue is _____ tissue
specialized tissue
neuron cell membrane extensions bringing information into the cell body
dendrites
group of cell bodies in PNS
ganglia
a group of neurons located outside the CNS
ganglion
group of cell bodies in CNS
nuclei
bundles of myelinated axons in PNS
nerves
bundles of myelinated axons in CNS
tracts
sensory and motor for body and head
somatic
sensory and motor for internal organs
visceral
receptor that monitors the position and movements of joints and muscles
proprioceptor
receptor that monitors the external environment
exteroceptor
rapid, stereotyped response to a stimulus
reflex
nerve impulse, change in polarization of membrane;
sudden, transitory change in the polarity of a neuron cell membrane
action potential
exchange of Na+ and K+ ions causes across membrane ____
depolarization
2 neurons communicate at the ___
synapse
neuroglia cells that produce myelin in PNS
Schwann cells
wrap cytoplasm around membrane of axons to insulate, white part of white matter
myelin
include many kinds of neurolgia cells in PNS
satellite cells
unmyelinated gaps between Schwann cells, allows saltatory conduction, increases speed of transmission of action potential down axon
nodes of Ranvier
____ conduction is the ‘jumping’ of an action potential from one node of Ranvier to another
saltatory conduction
