BIO 201 EXAM 4 ASU QUESTIONS WITH
CORRECT ANSWERS 2025
ss
Olfactory Nerve - CORRECT ANSWER -- Cranial Nerve: I
- Composition: Sensory
- Function: Smell
- Damaged: Impaired smell
Optic Nerve - CORRECT ANSWER -- Cranial Nerve: II
- Composition: Sensory
- Function: Vision
- Damaged: Blindness
Oculomotor Nerve - CORRECT ANSWER -- Cranial Nerve: III
- Composition: Motor
- Function: Eye movement, Opening of eyelid, and pupil constriction
- Damaged: drooping eyelid, dilated pupil, inability to move eye in some directions
Trochlear Nerve - CORRECT ANSWER -- Cranial Nerve: IV
- Composition: Motor
- Function: Eye Movement (superior oblique muscle)
- Damaged: weakened ability to look downward
Trigeminal Nerve - CORRECT ANSWER -- Cranial Nerve: V
- Composition: Two sensory divisions (Ophthalamic and Maxillary)
- Function: Sensory - face; motor - muscles of mastication
- Damaged: loss of facial sensation; impaired chewing
Abducens Nerve - CORRECT ANSWER -- Cranial Nerve: VI
,- Composition: Motor
- Function: Lateral movement of eye
- Damaged: inability to turn eye laterally
Facial Nerve - CORRECT ANSWER -- Cranial Nerve: VII
- Composition: Mixed
- Function: Sensory - taste on anterior 2/3 of tongue; Motor - various facial/neck muscles and glands
- Damaged: Inability to control facial muscles, impaired sense of taste
Vestibulocochlear Nerve - CORRECT ANSWER -- Cranial Nerve: VIII
- Composition: Sensory
- Function: Hearing and balance
- Damaged: Deafness and impaired balance
Glossopharyngeal Nerve - CORRECT ANSWER -- Cranial Nerve: IX
- Composition: Mixed
- Function: Sensory -
taste, touch, pressure, pain, and temperature on posterior 1/3 of tongue; Motor -
salivation, swallowing, and gagging
- Damaged: Loss of taste, impaired swallowing
Vagus Nerve - CORRECT ANSWER -- Cranial Nerve: X
- Composition: Mixed
- Function: Sensory - taste, hunger, and fullness; Motor -
swallowing, speech, and regulation of heart and GI tract
- Damaged: Impaired swallowing and GI motility; fatal if both Vagus nerves are damaged
Accessory Nerve - CORRECT ANSWER -- Cranial Nerve: XI
- Composition: Motor
- Function: Swallowing; head, neck, and shoulder movements
,- Damaged: Impaired movement of head, neck and shoulders
Hypoglossal Nerve - CORRECT ANSWER -- Cranial Nerve: XII
- Composition: Motor
- Function: Tongue movements for speech, food manipulation, and swallowing
- Damaged: Impaired tongue movements for speech and swallowing
Longitudinal Fissure - CORRECT ANSWER -Separates 2 cerebral hemispheres.
Central Sulcus - CORRECT ANSWER -Separates parietal and frontal lobes.
Gyri - CORRECT ANSWER -Thick folds (hills) of the brain.
Sulci - CORRECT ANSWER -Shallow grooves (valleys) of the brain.
Corpus Callosum - CORRECT ANSWER --
Thick nerve bundle at the bottom of the longitudinal fissure that connects hemispheres.
- Considered part of the cerebrum.
- Allows for communication between the hemispheres.
Gray Matter - CORRECT ANSWER -- Neuron cell bodies, dendrites, and synapses.
- Forms cortex over cerebrum and cerebellum.
- Forms nuclei deep within the brain.
White Matter - CORRECT ANSWER -- Bundles of Axons
- Forms tracts that connect parts of brain.
Dura Mater (Meninges) - CORRECT ANSWER -- Outermost, tough membrane
- Outer periosteal layer against bone
-
, - Inner ssmeningeal ss layer
- Subdural ssSpace
- Where ssseparated ssfrom ssinner ssmeningeal sslayer ssforms ss dural ssvenous ss sinuses ssdrain ssblood ss from
ss brain.
- Supportive ssstructures ssformed ssby ssdura ssmater
- Falx sscerebri, ssfalx ssCerebelli ssand sstentorium sscerebelli
Arachnoid ssMater ss(Meninges) ss - ssCORRECT ssANSWER ss-Spider ssweb ssfilamentous sslayer.
Pia ssMater ss (Meninges) ss - ss CORRECT ss ANSWER ss-Thin, ss vascular ss layer ss adherent ss to ssthe sscontours ssof
ss the ss brain.
Meningitis ss- ss CORRECT ssANSWER ss -Inflammation ssof ss the ssMeninges
- Bacterial ssand ss virus s s invasion ss of ss the ss CNS ss by ss way ss of ss the s s nose s s and ss throat.
- Signs ssinclude ss high ssfever, ssstiff ssneck, ssdrowsiness, ssand ssintense ssheadache ss and ssmay ssprogress ssto
ss coma
- Diagnose ssby ss examining ssthe ssCSF
- Lumbar ssPuncture ss(Spinal ss Tap)
Internal ss chambers sswithin ssthe ss CNS
(In ssorder) ss- ssCORRECT ssANSWER ss-Lateral ssVentricles ss- ssInside ssCerebral
hemispheres. ssThird ssVentricle ss- ssA sssingle ssvertical ssspace ssunder ssCorpus
ss
Callosum.
ss
Cerebral ssAqueduct ss- ss Runs ss through ssmidbrain.
Fourth ssVentricle ss- ssSmall sschamber ssbetween sspons ssand
cerebellum. ssCentral ssCanal ss- ssRuns ssdown ssthrough ssspinal
ss
cord.
ss
- Lined ss with ssependymal ss cells ss and ss containing ss choroid ssplexus ss of sscapillaries ssthat ss produce ss CSF.
Cerebrospinal ssFluid ss - ss CORRECT ss ANSWER ss --
Clear ss liquid ssfills ssventricles ss and ss canals ss and ss bathes ssits ssexternal ss surface ss(in ss subarachnoid ssspace)
- Brain ss produces ss and ss absorbs ss about ss 500 ssml/day
CORRECT ANSWERS 2025
ss
Olfactory Nerve - CORRECT ANSWER -- Cranial Nerve: I
- Composition: Sensory
- Function: Smell
- Damaged: Impaired smell
Optic Nerve - CORRECT ANSWER -- Cranial Nerve: II
- Composition: Sensory
- Function: Vision
- Damaged: Blindness
Oculomotor Nerve - CORRECT ANSWER -- Cranial Nerve: III
- Composition: Motor
- Function: Eye movement, Opening of eyelid, and pupil constriction
- Damaged: drooping eyelid, dilated pupil, inability to move eye in some directions
Trochlear Nerve - CORRECT ANSWER -- Cranial Nerve: IV
- Composition: Motor
- Function: Eye Movement (superior oblique muscle)
- Damaged: weakened ability to look downward
Trigeminal Nerve - CORRECT ANSWER -- Cranial Nerve: V
- Composition: Two sensory divisions (Ophthalamic and Maxillary)
- Function: Sensory - face; motor - muscles of mastication
- Damaged: loss of facial sensation; impaired chewing
Abducens Nerve - CORRECT ANSWER -- Cranial Nerve: VI
,- Composition: Motor
- Function: Lateral movement of eye
- Damaged: inability to turn eye laterally
Facial Nerve - CORRECT ANSWER -- Cranial Nerve: VII
- Composition: Mixed
- Function: Sensory - taste on anterior 2/3 of tongue; Motor - various facial/neck muscles and glands
- Damaged: Inability to control facial muscles, impaired sense of taste
Vestibulocochlear Nerve - CORRECT ANSWER -- Cranial Nerve: VIII
- Composition: Sensory
- Function: Hearing and balance
- Damaged: Deafness and impaired balance
Glossopharyngeal Nerve - CORRECT ANSWER -- Cranial Nerve: IX
- Composition: Mixed
- Function: Sensory -
taste, touch, pressure, pain, and temperature on posterior 1/3 of tongue; Motor -
salivation, swallowing, and gagging
- Damaged: Loss of taste, impaired swallowing
Vagus Nerve - CORRECT ANSWER -- Cranial Nerve: X
- Composition: Mixed
- Function: Sensory - taste, hunger, and fullness; Motor -
swallowing, speech, and regulation of heart and GI tract
- Damaged: Impaired swallowing and GI motility; fatal if both Vagus nerves are damaged
Accessory Nerve - CORRECT ANSWER -- Cranial Nerve: XI
- Composition: Motor
- Function: Swallowing; head, neck, and shoulder movements
,- Damaged: Impaired movement of head, neck and shoulders
Hypoglossal Nerve - CORRECT ANSWER -- Cranial Nerve: XII
- Composition: Motor
- Function: Tongue movements for speech, food manipulation, and swallowing
- Damaged: Impaired tongue movements for speech and swallowing
Longitudinal Fissure - CORRECT ANSWER -Separates 2 cerebral hemispheres.
Central Sulcus - CORRECT ANSWER -Separates parietal and frontal lobes.
Gyri - CORRECT ANSWER -Thick folds (hills) of the brain.
Sulci - CORRECT ANSWER -Shallow grooves (valleys) of the brain.
Corpus Callosum - CORRECT ANSWER --
Thick nerve bundle at the bottom of the longitudinal fissure that connects hemispheres.
- Considered part of the cerebrum.
- Allows for communication between the hemispheres.
Gray Matter - CORRECT ANSWER -- Neuron cell bodies, dendrites, and synapses.
- Forms cortex over cerebrum and cerebellum.
- Forms nuclei deep within the brain.
White Matter - CORRECT ANSWER -- Bundles of Axons
- Forms tracts that connect parts of brain.
Dura Mater (Meninges) - CORRECT ANSWER -- Outermost, tough membrane
- Outer periosteal layer against bone
-
, - Inner ssmeningeal ss layer
- Subdural ssSpace
- Where ssseparated ssfrom ssinner ssmeningeal sslayer ssforms ss dural ssvenous ss sinuses ssdrain ssblood ss from
ss brain.
- Supportive ssstructures ssformed ssby ssdura ssmater
- Falx sscerebri, ssfalx ssCerebelli ssand sstentorium sscerebelli
Arachnoid ssMater ss(Meninges) ss - ssCORRECT ssANSWER ss-Spider ssweb ssfilamentous sslayer.
Pia ssMater ss (Meninges) ss - ss CORRECT ss ANSWER ss-Thin, ss vascular ss layer ss adherent ss to ssthe sscontours ssof
ss the ss brain.
Meningitis ss- ss CORRECT ssANSWER ss -Inflammation ssof ss the ssMeninges
- Bacterial ssand ss virus s s invasion ss of ss the ss CNS ss by ss way ss of ss the s s nose s s and ss throat.
- Signs ssinclude ss high ssfever, ssstiff ssneck, ssdrowsiness, ssand ssintense ssheadache ss and ssmay ssprogress ssto
ss coma
- Diagnose ssby ss examining ssthe ssCSF
- Lumbar ssPuncture ss(Spinal ss Tap)
Internal ss chambers sswithin ssthe ss CNS
(In ssorder) ss- ssCORRECT ssANSWER ss-Lateral ssVentricles ss- ssInside ssCerebral
hemispheres. ssThird ssVentricle ss- ssA sssingle ssvertical ssspace ssunder ssCorpus
ss
Callosum.
ss
Cerebral ssAqueduct ss- ss Runs ss through ssmidbrain.
Fourth ssVentricle ss- ssSmall sschamber ssbetween sspons ssand
cerebellum. ssCentral ssCanal ss- ssRuns ssdown ssthrough ssspinal
ss
cord.
ss
- Lined ss with ssependymal ss cells ss and ss containing ss choroid ssplexus ss of sscapillaries ssthat ss produce ss CSF.
Cerebrospinal ssFluid ss - ss CORRECT ss ANSWER ss --
Clear ss liquid ssfills ssventricles ss and ss canals ss and ss bathes ssits ssexternal ss surface ss(in ss subarachnoid ssspace)
- Brain ss produces ss and ss absorbs ss about ss 500 ssml/day
