chapter 13 pt 2 Flashcards
spaces in brain are called
ventricles
ventricles are
cavities within the brain
ventricles are lined with
ependymal cells
ventricles contain
cerebrospinal fluid
ventricles connect with each other and with spinal cords ____
central canal
ependymal regular compoisiton of
Cerebrospinal fluid
how many ventricles are within the brain
4 main ventricles in brain
how many lateral ventricles are there
2 lateral ventricles
the 2 lateral ventricles are seperated by medial partition called
seprum pellucidum
the 2 lateral centricles are large cavities in the
cerebrum
the third ventricle is a narrow space in the middle of the
diencephalon
the third ventricle is connected to lateral ventricles by the
interventricular foramen
the fourth centricle is _______ shaped
sickle
4th ventricle is located between
pons and cerebrum
the fourth ventricle is connected to the third ventricle by the
cerebral aqueduct
fourth ventricle open to subarachnoid space ____ and ___
medially and laterally
the fourth ventricle narrows before merging with the
central canal of spinal cord
CSF flows through brain structure through ventricles to be a
nutrutive substance forbrain tissue
CSF is clear and
colorless
CSF circulates in _____ and _______
ventricles and subarachnoid space
functions of CSF
buoyancy, protection, and envionmental stability
CSF allows for buoyancy by
reducing brain weight by 95%
CSF allows for protection by
providing a liquid cushion
CSF allows for envionmental stability by
transporting nutrients/wast and protecting against fluctuations
CSF produced by
choroid plexus
choroid plexus is in each
ventricle
ependymal cells and blood capillaries regulate
CSF from choroid plexus
Blood plasma is filtered through ______ and modified by
______
capillary ependymal cells
Compared to plasma, CSF has more____ and _____; less ____, ____, ____
sodium and chlorin; potassium, carbon, glucose
ependymal cell secretions and interstitial fluid from subarachnoid space help make up
cerebrospinal fluid
CSF is continually _____ and _____
formed and reobsorbed
Excess CSF flows into _______ and drains into ____
rachnoid villi ; dural venous sinuses
An ______ is a collection of these villi
arachnoid granulation
functions of blood brain barrier
Regulates which substances enter brain’s interstitial fluid
Helps prevent neuron exposure to harmful substances such as drugs
BBB composed of specialized capillaries
* Endothelial cells are connected by many tight junctions
* Walls have a thick basement membrane
* Wrapped by perivascular feet of astrocytes
BBB reduced in certain locations for functional reasons
* Choroid plexus needs to produce CSF
* Hypothalamus and pineal gland need to secrete hormones
23
what are some drugs that can pass blood brain barrier
alcohol
BBB composed of specialized
capillaries
Endothelial cells of BBB are connected by many
tight junctions
Walls of BBB cappilaries have a _____ membrane
BBB reduced in certain locations for functional reasons
thick basement
capilarries of BBB are wrapped by
perivascular feet of astrocytes
BBB reduced in certain locations for functional reasons like
Choroid plexus needs to produce CSF
* Hypothalamus and pineal gland need to secrete hormones
BBB astrocytes connect neurons to blood supply by
using perivascular feet to attach to capillaries to make junctions
cerebrum is the origin of
all complex intellectual functions
cerebrum has how many hemispheres
2
cerebrum is the center of
intelligence and reasoning
though, memory and judgement
voluntary control of skeletal muscle
conscious perception of senses
left and right hemisheres of cerebrum are called
cerebral hemispheres
in between cerbral hemispheres is the
longitudinal fissure
at a few locations white matter______ connect the hemispheres
tracts
the largest tract that provides connection between hemispheres is called
corpus callosum
Each hemisphere interacts with ____ side of body
opposite
what hemisphere is speech normally located
left
Some higher-order functions exhibit
cerebral lateralization
cerebral lateralization
primarily controlled by one side of the brain