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NUSCTX 10 Midterm 3 Exam Questions with 100% Correct Answers | Verified | Latest Update NUSCTX Exam Questions 2024 NUSCTX Exam Answers 2024 NUSCTX Exam NUSCTX Exam 2024 Questions And Answers Pdf Download NUSCTX Exam 2024 Questions NUSCTX Exam 2024 Answers NUSCTX Exam 2024 Pdf Download Free NUSCTX ...

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  • October 5, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • nusctx 10 midterm 3 exam questions with 100 corre
  • overview of the digestion and absorption of vitami
  • lipid digestion and absorption
  • lipid transport from the small intestine
  • dietary factors that increa

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NUSCTX 10 Midterm 3 Exam Questions with
100% Correct Answers | Verified | Latest
Update

overviewiofitheidigestioniandiabsorptioniofivitaminsi-iCorrectiAnswer-
1.iallivitamins:idigestiveiprocessiinitheistomachibeginitheireleaseiofivita
minsifromifoodi
2.iallivitamins:idigestiveienzymesiproducedibyitheipancreasiandiinitheire
leaseiofivitaminsiandifoodi(firstiputiintoiformithatiisibioavailable)
3.ifatisolubleivitaminsionly:ibileiproducediinitheiliveri(andistorediinitheig
all-balder)iaidsiinifat-solubleivitaminiabsorptioni
4.ifatisolubleivitaminsionly:ifat-
solubleivitaminsiareiabsorbediinitheismalliintestine,ialongiwithidietaryif
atiandicarriedibyichylomicronsiintoitheilymphaticicirculationi(piggyibacki
onilipidsipackageditoigetithroughiaqueousienvironment)i
5.iwaters-solubleivitaminsionly:iwater-
solubleivitaminsiareiabsorbediinitheismalliintestineiandireleasedidirectl
yiintoitheibloodithroughihepaticiportalicirculationi(noispecialipackagingi
needed)
5.ivitaminiKionly:ismalliamountsiofiKiareimadeibyibacteriaiinitheiiliumiofi
theismalliintestineiandiinitheilargeiintestine


lipididigestioniandiabsorptioni-iCorrectiAnswer--
initheismalliintestine,itheiproductsiofifatidigestioniandibileiacidsiformimi
celles,iwhichimoveicloseienoughitoitheimicrovilliitoiallowilipidsitoidiffus
eiintoitheimucosalicells

,-
insideitheimucosalicells,ifattyiacidsiandimonoglyceridesiareireassemble
diintoitriglyceridesiandiincorporatediintoilipiditransportiparticles,iwhichi
enteritheilymph


lipoproteini-iCorrectiAnswer--
transportilipidsiandicholesteroliinitheibloodi
-
containsitriglyceridesiandifreeicholesterol,iprotein,iphospholipids,ichol
esterolibonditoifattyiacids
-vitaminiA:iputitogetheriasiaitriglyceridei(initheicore)i
-ifiyouihaveidiseaseilikeiceliacithatidoesn'tiallowiabsorptioniofilipidsi--
>iVitaminiAideficiencyiifiitsitieditoiabsorptioni


lipoproteinsi(lipidsiinitheibloodicirculation):i
-VLDL:ideliversifattyiacidsimadeibyiliver
-IDL:ideliversifattyiacidsimadeibyiliveri
-LDL:ideliveryioficholesteroli
-
HDL:ipickingiupi(scavenging)iexcessicholesterolifromicellsiforideliveryiba
ckitoitheiliveri
-Chylomicrons:ideliveryiofifattyiacids


lipiditransportifromitheismalliintestinei-iCorrectiAnswer-
1.ichylomicronsiformediinitheimucosalicellsipassifirstiintoitheilymph,iwhi

,chidrainsiintoitheiblood.iTheyicirculateiinitheiblood,ideliveringitriglyceri
desitoibodyicells.i
2.iTheienzymeilipoproteinilipaseiwhichiisipresentionitheisurfaceioficellsili
ningitheibloodivessels,ibreaksidownitheitriglyceridesiinichylomicronsiint
oifattyiacidsiandiglycerol.iTheseicanithenienteritheisurroundingicells.i
4.iVLDLsiareimadeiinitheiliverianditransportilipidsiawayifromitheiliver.iTh
eyifunctionisimilarlyitoichylomicronsibecauseibothiparticlesideliveritrigl
yceridesitoibodyicellsiwithitheihelpiofitheienzymeilipoproteinilipase
6.iToidelivericholesterol,iLDLiparticlesibinditoiLDLireceptorsiinitheicellime
mbrane.iThisiallowsitheiLDLiparticleitoienteritheicell,iwhereitheicholeste
roliandiothericomponentsicanibeiused.i
7.iHDLiparticlesipickiupicholesterolifromiotheri
lipoproteinsiandibodyicellsiandireturniititoitheiliver.iSomeiofithisicholest
eroliisibrokenidowniandisomeiisitransferreditoiorgansiwithihighirequire
mentsiforicholesterol,isuchiasithoseithatisynthesizeisteroidihormones.


ketonesi-iCorrectiAnswer--
usediforienergy:iconvertedibackitoiacetyliCoAiandienteriTCAicycle,ibraini
canirunionienergyifromiketonesibutican'tirunionlyioniketonesi(stillineedig
lucoseifromidietioribreakingidowniproteins),iandiketonesispareiprotein
-ketonesilostiiniurineiandibreathi(fruityibreath)
-inefficientiuseiofienergy


dietaryifactorsithatiincreaseiriskiassociatediwithifatiintakei-
iCorrectiAnswer--cholesteroli


-saturatedifat

, -transifat
-sodium
-excessienergy
-excessisugar


fatisolubleivitaminsi(FSV)i-iCorrectiAnswer--vitaminsiA,D,E,K
-hydrophobic/lipophilic
-storageiinicellsiassociatediwithifat
-riskiofitoxicityiisigreater


1.iFSVi+ifati+ibileiacidsi=imicelles
2.iAbsorbedibyienterocytesiiniSIiandipackagediintoichylomicrons
3.ichylomicronsiareicirculatedithroughilymph,ithenibloodibeforeireachin
githeiliver
4.istorediinifatioriattacheditoitransportiproteinitoicirculateiiniblood


RolesiofiVitaminiAiinitheibodyi-iCorrectiAnswer-
1.ivisioni(worksiatiDNAilevel)i
2.iSkin,itrachea,iepithelialidifferentiation,iimmuneifunction,ithymusilym
phoidiorgansi
3.ireproductionispermato-
genesisiandireproductioniembryonalidevelopment

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