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BIO 201- Exam 4: Comprehensive Examination
Questions and Answers | 100% Pass
Guaranteed | Graded A+
Rostral -- correct answer--toward the nose
Caudal -- correct answer--toward the tail
Major portions of the brain -- correct answer--Brain stem, Cerebrum,
cerebellum
Cerebrum is ___% of brain volume -- correct answer--83
Cerebellum contains ___% of the neurons -- correct answer--50
The brain weighs ___ pounds -- correct answer--3.5
Longitudinal Fissure -- correct answer--separates 2 cerebral hemispheres
(left/right)
Central Sulcus -- correct answer--Separates frontal & parietal lobe
Gyri -- correct answer--folds
Sulci -- correct answer--grooves
, 2
cortex -- correct answer--surface layer of gray matter
nuclei -- correct answer--deeper masses of gray matter
tracts -- correct answer--bundles of axons
gray matter -- correct answer--neuron cell bodies, dendrites & synapses
-forms cortex over cerebrum & cerebellum
-forms nuclei deep with in brain
white matter -- correct answer--bundles of axons
-forms tracts that connect parts of the brain
Meninges -- correct answer--Dura Mater, arachnoid mater, pia mater
Dura mater -- correct answer--outermost, tough membrane
-outer periosteal layer against bone
-inner meningeal layer
-subdural space (below dura mater)
-where separated from inner meningeal layer forms dural venous sinusesdraining
blood from brain
supportive structures formed by dura mater -- correct answer--falx cerebri,
falx cerebelli & tentorium cerebelli
, 3
Arachnoid mater -- correct answer--spider web filamentous layer
Pia mater -- correct answer--a thin vascular layer adherent to contours of
brain
Meningitis -- correct answer--Inflammation of the meninges
-bacterial & virus invasion of the CNS by way of the nose & throat
-signs: high fever, stiff neck, drowsiness & intense headache which could lead to
coma
-diagnose by examining the CSF fluid for bacteria
Lumbar puncture -- correct answer--(spinal tap) check spinal fluid
-draws fluid from subarachnoid space between two lumbar vertebrae
Lateral ventricles -- correct answer--found inside the cerebral hemispheres
Third ventricle -- correct answer--single vertical space under corpus callosum
Cerebral aqueduct -- correct answer--runs through the midbrain (connects 3rd
& 4th ventricle)
Central canal -- correct answer--runs down through spinal cord
Ventricles -- correct answer--Internal chambers within the CNS
, 4
-lined with ependymal cells & containing choroid plexus of capillaries that
produce CSF
Cerebrospinal fluid -- correct answer--clear liquid that fills ventricles & canals
& bathes in its external surface (in subarachnoid space)
The brain produces & absorbs ___ml/day of CSF -- correct answer--500
Functions of CSF -- correct answer--Buoyancy: floats brain so its neutrally
buoyant
Protection: cushions from hitting inside of skull
Chemical stability: rinses away wastes
CSF escapes from ___ to surround the brain & is absorbed by ___ into venous
sinus -- correct answer--4th ventricle/ arachnoid villi
Circumventricular organs... -- correct answer--...in 3rd & 4th ventricles are
breaks in the barrier where blood has direct access
-monitoring of glucose, pH, osmolarity & other variations
-allows route for HIV to invade the brain
Blood-brain & Blood-CSF barriers -- correct answer--Tightly joined
endothelium
-permeable to lipid-soluble materials (alcohol, nicotine, O2, CO2 & anesthetics)
Hindbrain -- correct answer--Medulla Oblongata, Pons, Cerebellum
BIO 201- Exam 4: Comprehensive Examination
Questions and Answers | 100% Pass
Guaranteed | Graded A+
Rostral -- correct answer--toward the nose
Caudal -- correct answer--toward the tail
Major portions of the brain -- correct answer--Brain stem, Cerebrum,
cerebellum
Cerebrum is ___% of brain volume -- correct answer--83
Cerebellum contains ___% of the neurons -- correct answer--50
The brain weighs ___ pounds -- correct answer--3.5
Longitudinal Fissure -- correct answer--separates 2 cerebral hemispheres
(left/right)
Central Sulcus -- correct answer--Separates frontal & parietal lobe
Gyri -- correct answer--folds
Sulci -- correct answer--grooves
, 2
cortex -- correct answer--surface layer of gray matter
nuclei -- correct answer--deeper masses of gray matter
tracts -- correct answer--bundles of axons
gray matter -- correct answer--neuron cell bodies, dendrites & synapses
-forms cortex over cerebrum & cerebellum
-forms nuclei deep with in brain
white matter -- correct answer--bundles of axons
-forms tracts that connect parts of the brain
Meninges -- correct answer--Dura Mater, arachnoid mater, pia mater
Dura mater -- correct answer--outermost, tough membrane
-outer periosteal layer against bone
-inner meningeal layer
-subdural space (below dura mater)
-where separated from inner meningeal layer forms dural venous sinusesdraining
blood from brain
supportive structures formed by dura mater -- correct answer--falx cerebri,
falx cerebelli & tentorium cerebelli
, 3
Arachnoid mater -- correct answer--spider web filamentous layer
Pia mater -- correct answer--a thin vascular layer adherent to contours of
brain
Meningitis -- correct answer--Inflammation of the meninges
-bacterial & virus invasion of the CNS by way of the nose & throat
-signs: high fever, stiff neck, drowsiness & intense headache which could lead to
coma
-diagnose by examining the CSF fluid for bacteria
Lumbar puncture -- correct answer--(spinal tap) check spinal fluid
-draws fluid from subarachnoid space between two lumbar vertebrae
Lateral ventricles -- correct answer--found inside the cerebral hemispheres
Third ventricle -- correct answer--single vertical space under corpus callosum
Cerebral aqueduct -- correct answer--runs through the midbrain (connects 3rd
& 4th ventricle)
Central canal -- correct answer--runs down through spinal cord
Ventricles -- correct answer--Internal chambers within the CNS
, 4
-lined with ependymal cells & containing choroid plexus of capillaries that
produce CSF
Cerebrospinal fluid -- correct answer--clear liquid that fills ventricles & canals
& bathes in its external surface (in subarachnoid space)
The brain produces & absorbs ___ml/day of CSF -- correct answer--500
Functions of CSF -- correct answer--Buoyancy: floats brain so its neutrally
buoyant
Protection: cushions from hitting inside of skull
Chemical stability: rinses away wastes
CSF escapes from ___ to surround the brain & is absorbed by ___ into venous
sinus -- correct answer--4th ventricle/ arachnoid villi
Circumventricular organs... -- correct answer--...in 3rd & 4th ventricles are
breaks in the barrier where blood has direct access
-monitoring of glucose, pH, osmolarity & other variations
-allows route for HIV to invade the brain
Blood-brain & Blood-CSF barriers -- correct answer--Tightly joined
endothelium
-permeable to lipid-soluble materials (alcohol, nicotine, O2, CO2 & anesthetics)
Hindbrain -- correct answer--Medulla Oblongata, Pons, Cerebellum
