a&p lab final study NERVOUS

27 terms by wafpanda 

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dendrites

location where neuron recieves stimuli from other environments or neurons

perikaryon

neuron cell body

axon

carries information toward other cells

retrograde flow

axon information back toward cell body

axon hillock

base or initial segment of axon

axolemma

plasma membrane of axon

axoplasm

contains structural componants of axon

telodendria

axonal extensions at the end of axon trunk

neurotransmitters

chemical messengers synthesized in cell body

presynaptic membrane

where neurotransmitters are released

postsynaptic membrane

bears receptors for neurotransmitters

schwann

cell that forms myelin sheath in PNS

oligodendrocytes

cell that forms myelin sheath in CNS

central

nervous system consisting of brain and spinal cord

peripheral

nervous system consisting of nerves outside of spinal cord

cervical

phrenic nerve is in what plexus

bronchial

radial nerve is in what plexus

lumbar

femoral nerve is in what plexus

sacral

sciatic nerve is in what plexus

sympathetic

nervous system: increase heart rate

parasympathetic

nervous system: decrease heart rate

sensory

relfex arc step 1 - detects stimuli

interneuron

reflex arc step 2 - carries information

motor neuron

reflex arc step 3 - sends stimuli to muscle

muscle

reflex arc step 4 - muscle reacts

-70

resting potential

-55

threshold

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