Cohn 319 Final Exam Review Questions with All Correct Answers
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Module
Cohn 319
Institution
Cohn 319
Cohn 319 Final Exam Review Questions with All Correct Answers
What is the conduit between the lateral ventricle and third ventricle? - Answer-intraventricular foramen
What does the choroid plexus do? - Answer-Uses blood to produce CSF into the ventricles
What acts as a buffer for ionic conc...
Cohn 319 Final Exam Review Questions
with All Correct Answers
What is the conduit between the lateral ventricle and third ventricle? - Answer-
intraventricular foramen
What does the choroid plexus do? - Answer-Uses blood to produce CSF into the
ventricles
What acts as a buffer for ionic concentration for neurons in the brain? - Answer-
Cerebrospinal fluid
What glial cells work to re-equilibrate the sodium potassium concentration? - Answer-
Astrocytes
What percent of oxygen does the brain require vs what mass does it take up? - Answer-
20% of oxygen to supply the sodium potassium pumps
It is only 1/50 of your mass
What structure leaks CSF at the base of the brain to surround the brain and spinal
cord? - Answer-The apertures (medial and lateral)
What happens if you have meningitis? - Answer-Your CSF is not sterile/it is infected.
We do a spinal tap to diagnose this.
The subarachnoid space acts as an exit port for CSF to drain into the ___? - Answer-
Superior sagittal sinus
The superior sagittal sinus is venous or arterial blood? - Answer-Venous blood
(deoxygenated)
The subarachnoid space is between what? - Answer-3 layers called the meninges
What are the main layers of the meninges? - Answer-Dura mater (toughest, thickest,
outermost)
Subdural space (potential space)
Arachnoid mater
Subarachnoid space
Pia mater (tight fitting glove around brain)
, Why is the subdural space a potential space? - Answer-Under normal conditions the
dura mater sits on the arachnoid mater, but under the right conditions a pool of blood
can fill the subdural space.
When your brain stem starts getting crushed, what is one of the first reflexes to get shut
down? - Answer-The pupillary reflex
Which of the meninges is a delicate connective tissue membrane that clings tightly to
the brain like cellophane wrap following its every convolution? - Answer-The Pia Mater
What does the reticular activating system do? - Answer-It is a net of neurons going into
the diencephalon and the brain stem. It can be stimulated or inhibited by inputs to bring
your cerebral cortex to a wakeful state.
What system wakes us up? - Answer-Reticular activating system
What factors help stimulate the reticular activating system? - Answer-Light
Noise
Smell
Touch
Emotions
What system controls emotions? - Answer-The limbic system
True or false? The limbic system can influence the reticular system? - Answer-True
People who have severe damage to the reticular activating system go into comas true
or false? - Answer-True
What does Wernicke's area do? - Answer-Decodes what you hear and see into
comprehensible language, and then passes that information to Broca's area
What does the arcuate fasciculus connect? - Answer-Wernicke's Area to Broca's area
What area of the brain is activated when reading? - Answer-Visual cortex
What area of the brain is activated when you hear something? - Answer-Primary
auditory cortex
What area of the brain processes what you are about to say before you say it? -
Answer-Broca's Area
What area of the brain controls the movement of your mouth or ability to make sound
with your mouth? - Answer-Primary motor cortex
What are the tunics? - Answer-Layers
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