HUBS1403 Chapter Notes - Chapter 12: Depolarization, Myelin, Axon Terminal
25 Jun 2018
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10N CHANNELS +RESTING MEMBRANE POTENTIAL
ICF ECF .Nalk Exchange Pump -3Na from cytosol bind inside ,triggering ATP to
Kt 150 5split and change shape of pump .2k land Outside
,releasing Pas pump returns
Nat 15 150 to original shape
Cast 40-6 2.leak channels -open and close randomly .Found in all cells ,dendrites ,
CI
'
5110 cell bodies and Axons (Na )
.
•ligand -gated channels -open in response to chemical stimulus .Found
in dendrites of sensory neurons ;dendrites hell bodies of interneuron /motor
neurons (k)
.mechanically -gated channels -open In response to mechanical stimulus .
Found In dendrites of sensory neurons (Nat K)
.voltage -gated channels -open in response To change in membrane
potential .Found in axons of all neurons (Na )
•synaptic input zone -ligand -gated channels
.
AP
conduction zone -voltage .gated Na channels
.output zone -voltage -gated Ca channels
.resting membrane potential -resting conditions cells have a
potential difference across their plasma membrane
Document Summary
3 na from cytosol bind inside , triggering. 110 split and change shape of pump . P as pump returns to original shape leak channels open and close randomly . Found in all cells , dendrites , cell bodies and. Axons ( na ) in ligand - gated channels open in response to chemical stimulus. Found dendrites of sensory neurons ; dendrites hell bodies of interneuron. Found in dendrites of sensory neurons voltage - gated channels open in ( nat. K ) response to change in membrane potential . Found in input synaptic conduction output zone axons of all neurons ( na ) zone zone ligand - gated channels voltage . gated. Na channels resting membrane potential potential difference across voltage - gated ca channels. Ap their conditions resting plasma membrane cells have a. I threshold reached ) action potential propagation in touch membrane sensitive neurons in permeability. , opening of mechanically - gated ion channels alters.
