GCU BIO 201 Latest Exam 4 Questions
and Actual Complete Answers (2025-
2026) Updated.
Central Nervous System - Answer brain and spinal cord
Rostral - Answer toward forehead
Caudal - Answer Toward cord
longitudinal fissure - Answer divides cerebral hemispheres
Gyri - Answer folds
Sulci - Answer grooves
cortex - Answer surface layer of gray matter
Nuclei (in brain) - Answer deeper masses of gray matter
("mini brains" cluster of cell bodies)
tracts - Answer bundles of axons (white matter)
Gray matter - Answer neuron cell bodies, dendrites, and synapses
(on outside of brain)
White matter - Answer bundles of axons; forms tracts that connect parts of brain
(on inside of brain)
Dura mater - Answer Outermost layer of the meninges, tough membrane
, Arachnoid layer - Answer middle layer, wed-like
Pia mater - Answer thin, delicate inner membrane of the meninges
(lies on gyri of brain)
Meningitis - Answer inflammation of meninges
usually found in infants
Symptoms of meningitis - Answer high fever, stiff neck (nuchal rigidity), drowsiness, and
intense headache
How to diagnose meningitis - Answer examine CSF by lumbar puncture (spinal tap)
Brain ventricles - Answer where CSF is made
Cerebrospinal Fluid - Answer formed by choroid plexus - modified ependymal cells
Functions of CSF - Answer forms cushion for brain and spinal cord
gives buoyancy to brain
transports nutrients, chemical messengers and waste
Hydrocephalus - Answer water in brain
when CSF becomes obstructed
enlargement of head in babies
Arachnoid villi - Answer extensions of subarachnoid space; extend through dura mater to
superior sagittal sinus
Arachnoid granulations - Answer large clusters of villi
absorb CSF into venous circulation
and Actual Complete Answers (2025-
2026) Updated.
Central Nervous System - Answer brain and spinal cord
Rostral - Answer toward forehead
Caudal - Answer Toward cord
longitudinal fissure - Answer divides cerebral hemispheres
Gyri - Answer folds
Sulci - Answer grooves
cortex - Answer surface layer of gray matter
Nuclei (in brain) - Answer deeper masses of gray matter
("mini brains" cluster of cell bodies)
tracts - Answer bundles of axons (white matter)
Gray matter - Answer neuron cell bodies, dendrites, and synapses
(on outside of brain)
White matter - Answer bundles of axons; forms tracts that connect parts of brain
(on inside of brain)
Dura mater - Answer Outermost layer of the meninges, tough membrane
, Arachnoid layer - Answer middle layer, wed-like
Pia mater - Answer thin, delicate inner membrane of the meninges
(lies on gyri of brain)
Meningitis - Answer inflammation of meninges
usually found in infants
Symptoms of meningitis - Answer high fever, stiff neck (nuchal rigidity), drowsiness, and
intense headache
How to diagnose meningitis - Answer examine CSF by lumbar puncture (spinal tap)
Brain ventricles - Answer where CSF is made
Cerebrospinal Fluid - Answer formed by choroid plexus - modified ependymal cells
Functions of CSF - Answer forms cushion for brain and spinal cord
gives buoyancy to brain
transports nutrients, chemical messengers and waste
Hydrocephalus - Answer water in brain
when CSF becomes obstructed
enlargement of head in babies
Arachnoid villi - Answer extensions of subarachnoid space; extend through dura mater to
superior sagittal sinus
Arachnoid granulations - Answer large clusters of villi
absorb CSF into venous circulation
