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Exam 2: BSC2085/ BSC 2085 (Latest 2024/ 2025 Update) Anatomy and Physiology I | Qs & As| 100% Correct| Grade A (Verified Answers) £9.00   Add to cart
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Exam 2: BSC2085/ BSC 2085 (Latest 2024/ 2025 Update) Anatomy and Physiology I | Qs & As| 100% Correct| Grade A (Verified Answers)
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Exam 2: BSC2085/ BSC 2085 (Latest 2024/ 2025 Update) Anatomy and Physiology I | Qs & As| 100% Correct| Grade A (Verified Answers) Q: What are the 5 strata of keratinocytes in thick skin Answer: 1. Stratum basale 2. Stratum spinosum 3.Stratum granulosum 4. Stratum lucidum (missing in th...

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  • October 15, 2024
  • 49
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • bsc2085 bsc 2085 latestbsc2085 bsc
  • exam 2 bsc2085 bsc 2085 latest updat
  • what is nyctalopia and what causes it
  • what are the 5 strata of keratinocytes in thick sk
  • bsc2085bsc 2085bsc2085 bsc 2085 final

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Examl2:lBSC2085/lBSCl2085l(Latestl2024/
l2025lUpdate)lAnatomylandlPhysiologylIl|
lQsl&lAs|l100%lCorrect|lGradelAl(Verifiedl
Answers)
Q:lWhatlarelthel5lstrataloflkeratinocyteslinlthicklskin
Answer:
1.lStratumlbasale
l2.lStratumlspinosum
l3.Stratumlgranulosum
l4.lStratumlluciduml(missinglinlthinlskin)
l5.Stratumlcorneum
Bottomltoltop

Q:lWhatlislthelStratumlBasale?
Answer:
-Islattachedltolbasementlmembranelbylhemidesmosomes
-Formslalstronglbondlbetweenlepidermislandldermis
-Formslepidermallridgesl(basisloflfingerprints)l
-Dermallpapillael(tinylmounds)-lprojectionslfromltheldermis-
Increaselthelarealoflbasementlmembranelandlttrengthenlattachmentlbetweenlepidermislandlder
mis
-Haslmanylbasallcells,lorlgerminativelcells

Q:lWhatldetermineslfingerprints?
Answer:
Determinedlbylgeneticslandl
uterinelenvironmentlduringlfetalldevelopment.

Q:lDolidenticalltwinslhavelthelsamelfingerprints?
Answer:
No

,Q:lWhatlarelspecializedlcellsloflStratumlBasale?
Answer:
1.lMerkellcells-lspecializedlepithelialltactilelcells
Foundlinlhairlesslskinl
Respondltoltouchl(triggerlnervouslsystem)
2.lMelanocytes
Containlthelpigmentlmelanin
Scatteredlthroughoutlstratumlbasale

Q:lWhatlislthelStratumlSpinosum?
Answer:
"thel"spinyllayer"
-Producedlbyldivisionloflstratumlbasale
-Eightltoltenllayersloflkeratinocyteslboundlbyldesmosomes
-Cellslshrinkluntillcytoskeletonslstickloutl(lookslspiny)l-lunderlnormallhistologicallpreperations
-Continueltoldivide,lincreasinglthicknessloflepithelium
-Containldendriticl(Langerhans)lcells,lactivelinlimmunelresponsel-
ldefendlagainstlmicroorganismslthatlgetlpastlsuperficialllayersloflepidermislandldefendlagainstls
uperficiallskinlcancers

Q:lDescribelthelStratumlGranulosumllayer
Answer:
-thel"grainyllayer",lStopsldividing,lstartslproducing:
1.lKeratinl
Altough,lfibrouslproteinl
Makesluplhairlandlnails
2.lKeratohyalinl
Denselgranules
Cross-linklkeratinlfibers
Note:laslkeratinlaccumulates,lthelcelllflattenlandlitslplasmalmembranelthickenslandlbecomeslles
slpermeable

Q:lDescribelthelStratumlLucidum
Answer:
thel"clearllayer"
-Foundlonlylinlthicklskin
-Coverslstratumlgranulosum

,-Cellslherelarelflattened,ldenselylpackedlwithlkeratinlandlareldevoidloflorganelles

Q:lStratumlCornuem
Answer:
-thel"hornllayer"l(latinlcornu=horn)
-Exposedlsurfaceloflskinl(15ltol30llayersloflkeratinizedlcells)llastslaboutl2lweeks
-Waterlresistant,lnotlwaterlproof!
-Shedlandlreplacedleveryltwolweeks
-
Alllexposedlskinlsurfacesl(exceptlthelanteriorlofltheleyes)lundergolcornificationl(keratinization)
l-lformationloflprotective,lsuperficialllayersloflcellslfilledlwithlkeratin

Q:lCellsloflStratumlGranulosum
Answer:
-Producelproteinlfibers
-Dehydratelandldiel(organellesldisintegrate)
-Createltightlylinterlockedllayerloflkeratinlsurroundedlbylkeratohyalin
-Keratohylainlcrossllinkslkeratinlandldehydrateslcell

Q:lKeratinization
Answer:
-Thelformationloflallayerlofldead,lprotectivelcellslfilledlwithlkeratin
Occurslonlalllexposedlskinlsurfaceslexceptleyes

Q:lWhatlislthelskinllifelcycle?
Answer:
Skinllifelcycle
-Itltakesl7ltol10ldayslforlalcellltolmovelfromlstratumlbasaleltolstratumlcorneum
-Oncelthere,lcellslmaylremainlatlstratumlcorneumlforlanladditionall2lweekslbeforelsheddingloff

Q:lTwoltypesloflperspiration
Answer:
Insensiblelandlsensible

Q:lWhatlislInsensiblelperspiration

, Answer:
-Interstitiallfluidllostlbylevaporationlthroughlthelstratumlcorneuml
-Loselapprox.l500mLlorl1lpintloflH2Olperlday

Q:lWhatlislsensiblelperspiration?
Answer:
Waterlexcretedlbylsweatlglands

Q:lWhatlareldehydrationlresults?
Answer:
-Fromldamageltolstratumlcorneuml(e.g.,lburnslandlblistersl[insensiblelperspiration])
-Fromlimmersionlinlhypertoniclsolutionl(e.g.,lseawaterl[osmosis])l-skinlislNOTlwaterlproof!

Q:lWhatlislhydration?
Answer:
-Resultslfromlimmersionlinlhypotoniclsolutionl(e.g.,lfreshwaterl[osmosis])
-Causeslswellingloflepitheliallcells,levidentlonlthelpalmslandlsoles

Q:lWhatlpigmentslinfluencelskinlcolor?
Answer:
1.lCarotene
2.lMelanin
-Bloodlcirculationl(redlbloodlcells)lcanlalsolaffectlskinlcolor

Q:lWhatlislCarotene?
Answer:
-Orange-yellowlpigment
-Foundlinlorangelvegetables
Carrots,lsquashesl-lifloverconsumption,lcanlturnlskinlorangish
-Accumulateslinlepidermallcellslandlfattyltissueslofltheldermis
-CanlbelconvertedltolvitaminlAl-lusedlforlmaintenanceloflepithelialandlphotoreceptorlfunction

Q:lWhatlislCarotenemia?
Answer:
OverlconsumptionloflorangelvegetableslexlCarrots,lsquashes

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