BIOLl 322l BIOL322l Modulel 1:l Latestl

BIOLl 322/l BIOL322l Modulel 1:l (Latestl

2026/l 2027l Update)l 100%l Verifiedl Questionsl &l Answersl |l Gradel A

Q:l Whatl arel thel 3l typesl ofl membranesl thatl makel upl meninges?l

Answer:l

Dural matter,l arachnoidl matter,l andl pial matter

Q:l Dural Matterl (outermost)l

Answer:l

-l Physicallyl attachedl tol thel insidel ofl thel skulll withl highlyl resilientl connectionsl foundl atl thel suturesl betweenl thel platesl ofl thel craniuml -l Thick,l fibrousl materiall (canl getl tol 0.8l mml thick)

Q:l Arachnoidl Matterl

Answer:l

-l Middlel layerl ofl meninges -l Delicatel andl spiderl likel fibers -l Containsl protrusionsl thatl allowl CSFl tol drainl intol sinuses,l allowsl recyclingl ofl solublel substances

Q:l Pial Matterl (innermost)l

Answer:l

-l Veryl fragile -l Directl contactl withl surfacel ofl thel brain -l Closelyl followsl thel sulcil andl gyri

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Q:l Ventriclesl

Answer:l

Hollowl spacesl withinl thel brain

Q:l Howl manyl ventriclesl doesl thel humanl brainl have?l

Answer:l

4

Q:l Cerebrospinall fluidl (CSF)l

Answer:l

-l Highl saltl waterl solutionl -l Allowsl brainl tol remainl "floating"l insidel thel skulll sol thatl itl doesn'tl feell heavyl andl crushl thel cellsl andl bloodl vesselsl belowl it -l Protectsl brainl froml rapidl headl movements -l Canl washl awayl impuritiesl outl ofl thel brain -l 150mL~l inl humanl body

Q:l 3l majorl partsl ofl thel brainl

Answer:l

-l Cerebrum -l Cerebellum -l Brainstem

Q:l Cerebruml

Answer:l

-l Mostl prominentl regionl ofl thel brain -l Rightl andl leftl hemispheres

Q:l Gyril

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Answer:l

Bumpsl orl raisedl ridgesl onl outerl surfacel ofl thel brain

Q:l Sulcil

Answer:l

Groovedl indentations

Q:l Fissurel

Answer:l

Large,l deepl sulcus

Q:l Longitudinall fissurel

Answer:l

-l Mostl obviousl fissurel inl brain -l Dividesl brainl intol leftl andl rightl hemispheres -l Visiblel froml al dorsall view,l runningl alongl anterior-posteriorl axis

Q:l Centrall sulcusl

Answer:l

Largel fissurel thatl startsl atl thel dorsall partl ofl thel brainl atl aboutl thel halfwayl pointl onl thel anterior-posteriorl axis

Q:l Laterall fissurel

Answer:l

-l Runsl alongl thel anteriorl tol posteriorl direction -l Curvesl dorsally -l Seenl inl thel middlel thirdl ofl thel brain

Q:l 4l majorl lobesl ofl thel cortexl

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