Ls15 Ucla Phelan Final Exam Questions With 100% Correct And Verified Answers 2025

Ls 15 Phelan Final Exam Questions
With 100% Correct And Verified Answers
2025
Botoxi-iCORRECTiANSWERS-
Mostitoxicisubstance,ilethaliati2ibillionthsiofiaigram.iProduc
edibyibacteriumiClostrid
iumibotulinumiasiaidefense.iCanicauseibotulism.iItigetsiintoi
terminalibuttoniatineuron/
muscleisynapsesiandidegradesiSNAP-
25iproteini(andiothers)ithatiareirequirediforifusioniofivesicle
siwithitheiterminalibuttonimembrane.iItipreventsitheirelease
iofiacetylcholineiandiparalyzesitheimuscle.iStaysiiniterminali

buttonifori2-4imonths.

LSDi-iCORRECTiANSWERS-
Bindsitoiserotoniniinireceptors,iincreasesisensitivity

Ecstasyi-iCORRECTiANSWERS-
Increasesiserotoniniproduction.iBlocksiserotoninireuptake.i
Permanentlyidamagesiserotonin-
producingicellsiinicerebralicortexi(usediinilearning)iandihip
pocampusi(usediforimemory)

Crystalimethi-iCORRECTiANSWERS-
Stimulatesidopamineiandiserotoninirelease

Oxycontini-iCORRECTiANSWERS-Mimicsiopium-
likeineurotransmitteriinipainineurons,iblockingitheirifunctio
n

Adderalli-iCORRECTiANSWERS-
Increasesitheireleaseiofiadrenalineiandidopamine;iblocksire
uptakeiofiadrenaline,idopamine,iandiserotonin

Whatiisialcohol?i-iCORRECTiANSWERS-Ethanol,idepressant


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,Whyidoesialcoholiaffectius?i-iCORRECTiANSWERS-
Itimimicsiailotiofineurotransmitters

Howidoesialcoholireduceianxiety?i-iCORRECTiANSWERS-
ItimimicsiGABAi(aniinhibitoryiNTithatipreventsicellsifromifir
ing,icalmingiyouidown),ienhancingiitsiefficiency.

Howidoesialcoholiproduceistimulatedienergizedifeelings?i-
iCORRECTiANSWERS-

Dopamineimakesiusihappy.iAlcoholiincreasesidopamineilevel
s.

Howidoesialcoholiblockipain?i-iCORRECTiANSWERS-
Endorphinsiblockipainimessages.iAlcoholistimulatesiendorp
hinirelease.

Alcoholi+iDepressioni-iCORRECTiANSWERS-
Serotoninimakesiusicontext.iAlcoholiincreasesiserotoninirec
eptoriactivity.

Howidoesialcoholislowiyouidown?i-iCORRECTiANSWERS-
GlutamateiisianiexcitatoryiNTithatialcoholiblocksitheirecept
orsiof.iItiisislowed/slurredispeech.

Howidoiouribodiesiprocessialcohol?i-iCORRECTiANSWERS-
Ethanoli-->iAlcoholidehydrogenasei-->iAcetaldehydei--
>iAldehydeidehydrogenasei-->iAceticiacid

Whyicaniweimetabolizeialcohol?i-iCORRECTiANSWERS-
Ouriinternalibacteriaiproduceialcoholiinismalliamounts.

WhyidoesiAsiansigetiAsianiflush?i-iCORRECTiANSWERS-
50%iofiAsiansiproduceianiinactiveiformiofialdehydeidehydro
genase,isoiacetaldehydeilevelsiincrease.iAcetaldehydeicause
sirapidipulse,isweating,iskiniflushing,inausea/
vomiting.iFastiflushingiisihavingibothicopiesiofiinactiveialde
hydeidehydrogenaseigene,iandislowiflushingiisiwhenithereiisi
oneicopy.


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, Whatiareimanyigeneticidiseasesioribeneficialiconditionsithei
resultiof?i-iCORRECTiANSWERS-Non-
functioningimetabolicipathways.

Non-geneticiinfluencesionialcoholimetabolismi-
iCORRECTiANSWERS-

Antabuse:iBlocksiactioniofialdehydeidehydrogenase
Aspirin:iBlocksialcoholidehydrogenase

WhyidoesiAntabuseihaveiailowisuccessirateiinitreatingialcoh
olism?i-iCORRECTiANSWERS-
Nobodyiwantsitoitakeiaidailyipilliforinegativeiresults.iCouldiw
orkibetteriasiaione-a-yearithing.

Dopamineireceptorigenei-iCORRECTiANSWERS-
Longiversioniofitheigene:imoreiresponsiveireceptor
Shortiversioniofitheigene:ilessiresponsiveireceptor
Worldwide,iatileasti20%icarryiatileasti1icopyiofitheilongigene
,isoitheyigetimoreipleasureifromidopamineirelease.

ShortiDRD4igeneitraitsi-iCORRECTiANSWERS--reflective
-rigid
-loyal
-stoic
-slow-tempered
-frugal

LongiDRD4igeneitraitsi-iCORRECTiANSWERS--impulsive
-exploratory
-fickle
-excitable
-quick-tempered
-extravagant

Correlationsiandipredictionsiofirisk-takersi(6ithings)i-
iCORRECTiANSWERS-1.iSpicyifoodipreference

2.iAlcoholiuse/abusei(3.5ximoreiareialcoholics)



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