BIO 201 - Exam 4 - ASU TOPAL-
Questions with All Correct Answers.
Longitudinal Fissure - Answer Separates 2 cerebral hemispheres.
Rostral - Answer Humans = toward the forehead
Animals = toward the nose (beak)
Caudal - Answer Humans = toward the spinal cord
Animals = toward the tail
Central Sulcus - Answer Separates parietal and frontal lobes.
Gyri - Answer Thick folds (hills) of the brain.
Sulci - Answer Shallow grooves (valleys) of the brain.
Corpus Callosum - 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 - Answer - Neuron cell bodies, dendrites, and synapses.
- Forms cortex over cerebrum and cerebellum.
- Forms nuclei deep within the brain.
White Matter - Answer - Bundles of Axons
- Forms tracts that connect parts of brain.
Cortex - Answer - Outer layer of some organs such as the adrenal glands, kidneys, cerebrum,
lymph nodes, ovaries, and hairs
- Usually covers or encloses tissue called the medulla
Dura Mater (Meninges) - Answer - Outermost, tough membrane
- Has two layers = outer periosteal layer against bone and inner meningeal layer
, - Pressed closely against cranial bones
- No epidural space and no attachment to bone except around foramen magnum, sella turcica,
crista galli, and sutures
Subdural space - Answer Between dura mater and arachnoid mater
Arachnoid Mater (Meninges) - Answer - Transparent membrane over brain surface
- Subarachnoid space separates arachnoid mater from pia mater below
- Subdural space separates it from dura mater above in some places
Pia Mater (Meninges) - Answer Very thin membrane that follows contours of brain, even
dipping into sulci
Places meningeal layer of dura folds inward - Answer Falx cerebri - separates the two cerebral
hemispheres
Falx cerebelli - separates the right and left halves of cerebellum
Tentorium cerebelli - separates cerebrum from cerebellum
Meningitis - Answer - Inflammation of the Meninges
- Bacterial and virus invasion of the CNS by way of the nose and throat.
- Signs include high fever, stiff neck, drowsiness, and intense headache and may progress to
coma
- Diagnose by examining the CSF
- Lumbar Puncture (Spinal Tap)
Bacterial meningitis - Answer Worse type of meningitis, can cause swelling of the brain,
enlargement of the ventricles, and hemorrhage
CSF pathway - Answer CSF secreted in lateral ventricles (2 lateral) flows through
interventricular foramen into third ventricle, then down the cerebral aqueduct into the fourth
ventricle
Cerebrospinal Fluid - Answer - Clear liquid fills ventricles and canals and bathes its external
surface (in subarachnoid space)
- Brain produces and absorbs about 500 ml/day
-Escapes from 4th ventricle to surround the brain.
- Absorbed by arachnoid villi into venous sinus.
Questions with All Correct Answers.
Longitudinal Fissure - Answer Separates 2 cerebral hemispheres.
Rostral - Answer Humans = toward the forehead
Animals = toward the nose (beak)
Caudal - Answer Humans = toward the spinal cord
Animals = toward the tail
Central Sulcus - Answer Separates parietal and frontal lobes.
Gyri - Answer Thick folds (hills) of the brain.
Sulci - Answer Shallow grooves (valleys) of the brain.
Corpus Callosum - 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 - Answer - Neuron cell bodies, dendrites, and synapses.
- Forms cortex over cerebrum and cerebellum.
- Forms nuclei deep within the brain.
White Matter - Answer - Bundles of Axons
- Forms tracts that connect parts of brain.
Cortex - Answer - Outer layer of some organs such as the adrenal glands, kidneys, cerebrum,
lymph nodes, ovaries, and hairs
- Usually covers or encloses tissue called the medulla
Dura Mater (Meninges) - Answer - Outermost, tough membrane
- Has two layers = outer periosteal layer against bone and inner meningeal layer
, - Pressed closely against cranial bones
- No epidural space and no attachment to bone except around foramen magnum, sella turcica,
crista galli, and sutures
Subdural space - Answer Between dura mater and arachnoid mater
Arachnoid Mater (Meninges) - Answer - Transparent membrane over brain surface
- Subarachnoid space separates arachnoid mater from pia mater below
- Subdural space separates it from dura mater above in some places
Pia Mater (Meninges) - Answer Very thin membrane that follows contours of brain, even
dipping into sulci
Places meningeal layer of dura folds inward - Answer Falx cerebri - separates the two cerebral
hemispheres
Falx cerebelli - separates the right and left halves of cerebellum
Tentorium cerebelli - separates cerebrum from cerebellum
Meningitis - Answer - Inflammation of the Meninges
- Bacterial and virus invasion of the CNS by way of the nose and throat.
- Signs include high fever, stiff neck, drowsiness, and intense headache and may progress to
coma
- Diagnose by examining the CSF
- Lumbar Puncture (Spinal Tap)
Bacterial meningitis - Answer Worse type of meningitis, can cause swelling of the brain,
enlargement of the ventricles, and hemorrhage
CSF pathway - Answer CSF secreted in lateral ventricles (2 lateral) flows through
interventricular foramen into third ventricle, then down the cerebral aqueduct into the fourth
ventricle
Cerebrospinal Fluid - Answer - Clear liquid fills ventricles and canals and bathes its external
surface (in subarachnoid space)
- Brain produces and absorbs about 500 ml/day
-Escapes from 4th ventricle to surround the brain.
- Absorbed by arachnoid villi into venous sinus.
