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Central Nervous-pns

QuestionAnswer
what are axon called in pns? Nerves
what is the difference between PNS & CNS? PNS lacks interneuron
what are cell bodies known as in pns? ganglion
what does pns consist of? afferent-motor efferent-sensory
What are the subdivision of afferent? autonomic and somatic. Autonomic divided further into parasympathetic and sympathetic.
what do oligodendrocytes and neurolimacyte have in common? form the myelin sheath
where are oligodendrocytes found? In cns
neurolimacytes myelin sheath in PNS
what are microglia? phagocytic cells
how many neuroglial cells are there? 6 2 in pns, 4 in cns
what charge does Na carry? + = Cation
What charge does K carry? - = Anion
what is action potential? a stimuli- all or nothing
depolarization NA moves in + another +30 goes in making it positive 30
what are the two types of synaptic potential? epsp-excitatory ipsp- inhibitory
what are the two types of neuroreceptors? Nicotonic- esps muscarinic- ipsp, epsp
where is Cerebral Spinal Fluid Made? Choroid Plexus
Arachnoid Villi extend into subarchnoid space and returns CSF to the circulatory system
muscle and neurons are the only cells that are excitable- can depolarize
repolarization K moving out
what is graded? chemical/ ligand
what is nongraded? Voltage= all or nothing
NA epsp
Cl Ipsp
Neuroreceptors can be Ion channels
more synaptic vesicles under exocytosis means? larger depolarization, Do NOT hve a refractory period
Nicotonic Receptors requires 2 binding sites, always exictatory
what are G proteins? three small proteins, Alpha, beta, gamma
Gproteins can cause ipsp or epsp
effector enzyme adenlyate cyclase is activated by? the alpha g protein
what does adenlyate cyclase do? Catalyzes ATP to cyclic AMP(cAMP)
what activates kinease? cAMP
Dopaminergic neurons releases dopamine
2 neural pathways of dopamine motor control, motivation & reward
Cocaine binds to re-uptake transporters for dopamine. does not get back to presynaptic axon for breakdown
Nigrostniatial Dopamine system controls body movement
mesolimbic controls emotional reward
Created by: RP87
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