BIO 201 EXAM 4| WITH ALL 270+ ACTUAL QUESTIONS &
CORRECT ANSWERS|| GRADED A+ | LATEST 2025
1. Rostral ANS toward the nose
2. Caudal ANS toward the tail
3. Major portions of the brain ANS Brain stem, Cerebrum, cerebellum
4. Cerebrum is % of brain volume ANS 83
5. Cerebellum contains % of the neurons ANS 50
6. The brain weighs ___ pounds ANS 3.5
7. Longitudinal Fissure ANS separates 2 cerebral hemispheres (left/right)
8. Central Sulcus ANS Separates frontal & parietal lobe
9. Gyri ANS folds
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, 10. Sulci ANS grooves
11. cortex ANS surface layer of gray matter
12. nuclei ANS deeper masses of gray matter
13. tracts ANS bundles of axons
14. gray matter ANS neuron cell bodies, dendrites & synapses
-forms cortex over cerebrum & cerebellum
-forms nuclei deep with in brain
15. white matter ANS bundles of axons
-forms tracts that connect parts of the brain
16. Meninges ANS Dura Mater, arachnoid mater, pia mater
17. Dura mater ANS 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
18. supportive structures formed by dura mater ANS falx cerebri, falx
cerebelli & tentorium cerebelli
19. Arachnoid mater ANS spider web filamentous layer
20. Pia mater ANS a thin vascular layer adherent to contours of brain
21. Meningitis ANS Inflammation of the meninges
https://www.stuvia.com/user/Mboffin
, -bacterial & virus invasion of the CNS by way of the nose & throat
-signs ANS high fever, stiff neck, drowsiness & intense headache which could lead t
coma
-diagnose by examining the CSF fluid for bacteria
22. Lumbar puncture ANS (spinal tap) check spinal fluid
-draws fluid from subarachnoid space between two lumbar vertebrae
23. Lateral ventricles ANS found inside the cerebral hemispheres
24. Third ventricle ANS single vertical space under corpus callosum
25. Cerebral aqueduct ANS runs through the midbrain (connects 3rd & 4th ventricl
https://www.stuvia.com/user/Mboffin
, 26. Central canal ANS runs down through spinal cord
27. Ventricles ANS Internal chambers within the CNS
-lined with ependymal cells & containing choroid plexus of capillaries that produce
CSF
28. Cerebrospinal fluid ANS clear liquid that fills ventricles & canals & bathes
in its external surface (in subarachnoid space)
29. The brain produces & absorbs ml/day of CSF ANS 500
30. Functions of CSF ANS Buoyancy ANS floats brain so its neutrally
buoyant Protection ANS cushions from hitting inside of skull
Chemical stability ANS rinses away wastes
31. CSF escapes from to surround the brain & is absorbed by into
venous sinus ANS 4th ventricle/ arachnoid villi
32. Circumventricular organs... ANS ...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
33. Blood-brain & Blood-CSF barriers ANS Tightly joined endothelium
-permeable to lipid-soluble materials (alcohol, nicotine, O2, CO2 & anesthetics)
34. Hindbrain ANS Medulla Oblongata, Pons, Cerebellum
35. Medulla Oblongata ANS contains cardiac, vasomotor, respiratory & reflex
centers which adjust heart rate but also control coughing & sneezing, etc.
-3 cm extension of spinal cord
https://www.stuvia.com/user/Mboffin
CORRECT ANSWERS|| GRADED A+ | LATEST 2025
1. Rostral ANS toward the nose
2. Caudal ANS toward the tail
3. Major portions of the brain ANS Brain stem, Cerebrum, cerebellum
4. Cerebrum is % of brain volume ANS 83
5. Cerebellum contains % of the neurons ANS 50
6. The brain weighs ___ pounds ANS 3.5
7. Longitudinal Fissure ANS separates 2 cerebral hemispheres (left/right)
8. Central Sulcus ANS Separates frontal & parietal lobe
9. Gyri ANS folds
https://www.stuvia.com/user/Mboffin
, 10. Sulci ANS grooves
11. cortex ANS surface layer of gray matter
12. nuclei ANS deeper masses of gray matter
13. tracts ANS bundles of axons
14. gray matter ANS neuron cell bodies, dendrites & synapses
-forms cortex over cerebrum & cerebellum
-forms nuclei deep with in brain
15. white matter ANS bundles of axons
-forms tracts that connect parts of the brain
16. Meninges ANS Dura Mater, arachnoid mater, pia mater
17. Dura mater ANS 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
18. supportive structures formed by dura mater ANS falx cerebri, falx
cerebelli & tentorium cerebelli
19. Arachnoid mater ANS spider web filamentous layer
20. Pia mater ANS a thin vascular layer adherent to contours of brain
21. Meningitis ANS Inflammation of the meninges
https://www.stuvia.com/user/Mboffin
, -bacterial & virus invasion of the CNS by way of the nose & throat
-signs ANS high fever, stiff neck, drowsiness & intense headache which could lead t
coma
-diagnose by examining the CSF fluid for bacteria
22. Lumbar puncture ANS (spinal tap) check spinal fluid
-draws fluid from subarachnoid space between two lumbar vertebrae
23. Lateral ventricles ANS found inside the cerebral hemispheres
24. Third ventricle ANS single vertical space under corpus callosum
25. Cerebral aqueduct ANS runs through the midbrain (connects 3rd & 4th ventricl
https://www.stuvia.com/user/Mboffin
, 26. Central canal ANS runs down through spinal cord
27. Ventricles ANS Internal chambers within the CNS
-lined with ependymal cells & containing choroid plexus of capillaries that produce
CSF
28. Cerebrospinal fluid ANS clear liquid that fills ventricles & canals & bathes
in its external surface (in subarachnoid space)
29. The brain produces & absorbs ml/day of CSF ANS 500
30. Functions of CSF ANS Buoyancy ANS floats brain so its neutrally
buoyant Protection ANS cushions from hitting inside of skull
Chemical stability ANS rinses away wastes
31. CSF escapes from to surround the brain & is absorbed by into
venous sinus ANS 4th ventricle/ arachnoid villi
32. Circumventricular organs... ANS ...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
33. Blood-brain & Blood-CSF barriers ANS Tightly joined endothelium
-permeable to lipid-soluble materials (alcohol, nicotine, O2, CO2 & anesthetics)
34. Hindbrain ANS Medulla Oblongata, Pons, Cerebellum
35. Medulla Oblongata ANS contains cardiac, vasomotor, respiratory & reflex
centers which adjust heart rate but also control coughing & sneezing, etc.
-3 cm extension of spinal cord
https://www.stuvia.com/user/Mboffin
