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Retired NBME 19 Answers

nbme19/Block 0/Question#0 (reveal difficulty score)
An investigator studying the function of a ...
decreases the amplitude of the action potential 🔍 / 📺 / 🌳 / 📖
tags: Neuro repeat

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submitted by solidshake(25)
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An AP si ntgeaeedr ecno het asuotmmin of caregh at eht xano lkiholc seahrec a ldohserth .agvtloe Ocne het hrhseltod tgovela si aes,dsp na PA is tgnraee.de wHoer,ve hte kepa upiltedma of hte PA oaevb hshletdro cna tills ryav penindged on eht rebnum of aN sehnancl ttha are talmnsyuesilou nepo elwih het PA is p.ensetr

T,hsu after het AP thelsdhor has eneb caedrhe and teh PA si regeted,an het kpae eltaovg inttadea cna eb ecreudd in eumitapdl if eht sftir Na slacnehn atth oedpen nibge ot elcos saubece of a hrsot icnnitaaivot iemt.

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namesthegame22  xn Ilfu fo culiacm morf n-eprys. GV a++C .snenhalc s lrh thdeo emnmbare ntpteoila is deacehr, VG N+a lacsnenh oepn dan teh eatiairpnolzdo poregsaatp dnow eht tnctpisyaosp r,anememb inrrntpesgee the selcmu noitca a on.tt plie +

  • When acetylcholine binds postsynaptic nicotinic acetylcholine receptors, each receptor causes Its own postsynaptic voltage change, which is called an end-plate potential.

  • The summation of the end-plate potentials represents the membrane potential.

  • The synaptic acetylcholine concentration influences the amplitude of end-plate potentials

  • Blocking presynaptic, VG Ca channels would most decrease the end-plate potential amplitude!


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