NU 545 Unit 2 Study Guide with
Complete Solutions
Review the anatomy of the brain. Which portion is responsible for keeping you awake,
controlling thought, speech, emotions and behavior, maintaining balance and posture? -
Answer-Awake: Reticular Formation (Brainstem)
Thought: Prefrontal Area
...
Know the function of the arachnoid villi. - Answer✔✔-one-way valve directing CSF outflow into
the blood, but preventing blood into the subarachnoid space
What is the function of the CSF? Where is it produced? Where is it absorbed? - Answer✔✔-
protect intracranial and spinal cord structures from jolts
prevent brain from tugging on meninges, nerve roots, and blood vessels
choroid plexus produces CSF
absorbed into circulation through arachnoid villi
Review blood flow to the brain. - Answer✔✔-CO2>> primary regulator of blood flow
internal carotid arteries
vertebral arteries
Circle of Willis
What is the gate control theory of pain? - Answer✔✔-substantia gelatinosa>> regulates pain
transmission from nociceptors (pain) and non-nociceptors (touch)>>touch inhibits pain
Know the type of nerve fibers that transmit pain impulses. - Answer✔✔-nociceptors
A-delta: sharp, localized, fast pain
C-fibers: dull, ache, burn, slow m
A-beta: touch and vibration>>no pain, but modulate
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