practice_exam_2 - x Practice EXAM ~(Following are the type...

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--- , "" x Practice EXAM ~ (Following are the type of questions on last year exam. A good study ~~'beti1e~~ £lImmMyGfthe~~ questions can be found at the end of the chapter as well.) 1. Two successive APs in B p~ neuron elicit two independant ~ events in the postsynaptic neuron. What would be the basic cause or d1ml1smmr'iUl¥.~.~.that.migt.1t .oa:urst.m.By!"n:I~~'· f: . . he long. time constant. (tau) in. the posts.ynaptic membrane . The long time constant (tau) in the presynaptic membrane , A l,Qn~ Qw.8t.ron AP in tfle Jlfe~~ Aev.ron ' . .». Neurotransmitter release from the second AP overlaps that of the first W-~ ... Ca++ enters the postsynaptic neuron during the first presynaptic AP, so "the serond ptrmynaptie A.P efi'Citg s 'mrger 'pOlfu;ynitptie AP. 2. ~chonnesterHe (AChe) _ . · . A. normally functions to prolong stimulation of the postsynaptic cell :~=~~:'=~nction . . ,. ~ acetylcholine inside the presynaptic cal! · E. one of these. .' .3;. bBP.wben.tbe.~~~.do.oot.ovarlap,_~ because the time constant of the membrane is long relative to the time course of Iha~~ · LA AP initiation , · .~1empmBt.~ · . C. Na+ activation l)~ · . E. spatial summation 4. !n.a~bemg.adiv.atedb¥ a .~ •. the \tmd.the.p.ostS¥~ membrane moves towards _for that synapse. A. the ENa+ B. the EK+ C?~:=~=otentiaID. ,Ibe.~~
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I s. Wirub.af .the.~hem: .descrtbes.ti1e.med::im:DBm.~·.b.the propagation of the AP along the axon? ~ Na+ entering at one pktce 00 me 8)(00 dtffuses aKJng the m~ of the axon} depolarizins;l successive ses;lments of the axon in a wave all along the'tengthof1heax'On.
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