CHAPTER 12 Flashcards
nervous system functions
collect information, process and evaluate information, initiate response to information
somatic motor system
sends voluntary signals to skeletal muscles
Which aspect of the efferent nervous system has sympathetic and parasympathetic divisions?
autonomic
nerve connective tissue wrappings from deep to superficial
endoneurium, perineurium, epineurium
neuron characteristics
excitabililty, conductivity, secretion, extreme longevity, amitotic
short, unmyelinated process branching off cell body
dendrite
telodendria
axon terminals
synaptic knobs house ____ containing neurotransmitters
synaptic vesicles
axons split into branches called
axon collaterals
Where does the axon attach to the cell body?
axon hillock (triangular region of soma)
neurofibril
bundle of neurofilaments
anterograde transport
from cell body
retrograde transport
to cell body
neuron transport occuring at about 400 mm per day
fast axonal transport
Slow axonal transport occurs at ____ mm per day
0.1 to 3
Substances moved only from cell body toward knob
enzymes, cytoskeletal components, new axoplasm
synapse
place where a neuron connects to another neuron or an effector
electrical synapse
presynaptic and postsynaptic neurons bound together by gap junctions
