NEURO EXAM 1 EXAM (ACTUAL EXAM)
WITH 300+ QUESTIONS WITH VERY
ELABORATED ANSWERS CORRECTRY WELL
ORGANIZED LATEST 2024 – 2025 ALREADY
GRADED A+
Which meninge is double layered and where? - ANSWERS-dura, brain
What does the dura contain?
Describe difference between the cranial and spinal dura: - ANSWERS-blood
vessels and nerves
Cranial: periosteal & meningeal
,Spinal: only meningeal
What are the dura mater partitions? - ANSWERS-Falx cerebelli: (small/lower)
Between R/L cerebellar hemispheres
Falx cerebri: (big/upper)
Between R/L cerebral hemispheres
Tentorium cerebelli:
between cerebrum (above) and celebellum (below)
What are dural sinuses? - ANSWERS-parts of cranial dura mater that are
separated and filled with venous blood
What happens if positive charges flow out or negative charges flow into a resting
cell? - ANSWERS-less negative = depolarization.
more negative = repolarization.
the inside of the cell will be more negative than rmp = hyperpolarization
,What term is associated with RMP?
In a polarized membrane, where is the charge more negative?
Where is there more potassium? Sodium? - ANSWERS-polarization
inside
K = inside
Na = outside
List the sequence of events in an action potential: (6) - ANSWERS-RMP
Threshold stimulus
Depolarization (Na in)
Repolarization (K out)
Action potential propagation
Activation of the Na/K pump
What does the Na/K pump do? - ANSWERS-returns the Na & K back to where they
started out (rmp)
, What happens during depolarization and repolarization? - ANSWERS-
Depolarization:
↑ permeable to Na+
Na+ channels open
Na+ ions inward
Increase in electrical charge to positive
Repolarization:
↑ permeable to K+
K+ channels open
K+ ions outward
Return of negative electrical charge
What happens during the absolute refractory period?
Describe the charge of a cell at rest: - ANSWERS-polarized
negative inside, positive outside
What 2 stimuli do excitable cells respond to? - ANSWERS-environmental & from
another neuron
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