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PNB 2XB3 FULL Study Guide with Complete Solutions

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PNB 2XB3 FULL Study Guide with Complete Solutions A-alpha conduction velocity? - Answer-80-120 m/s A-beta conduction velocity? - Answer-35-75 m/s A-delta conduction velocity? - Answer-5-30 m/s C-fibers conduction velocity? - Answer-0.5-2 m/s A-alpha axon diameter? - Answer-13-20 microns A-be...

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  • October 7, 2024
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  • PNB 2XB3
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EmillyCharlotte
EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024

PNB 2XB3 FULL Study Guide with
Complete Solutions

A-alpha conduction velocity? - Answer✔✔-80-120 m/s


A-beta conduction velocity? - Answer✔✔-35-75 m/s

A-delta conduction velocity? - Answer✔✔-5-30 m/s

C-fibers conduction velocity? - Answer✔✔-0.5-2 m/s

A-alpha axon diameter? - Answer✔✔-13-20 microns

A-beta axon diameter? - Answer✔✔-6-12 microns

A-delta axon diameter? - Answer✔✔-1-5 microns

C-fibers axon diameter? - Answer✔✔-0.2-1.5 microns

Synaptic cleft width? - Answer✔✔-20-40 microns

Number of neurons in the human brain - Answer✔✔-100 billion neurons

How much of our brain do we use - Answer✔✔-100%

How much power does our brain produce - Answer✔✔-20 W, similar to dim light bulb

How much percentage of power does our brain use - Answer✔✔-20%

CNS - Answer✔✔-Central Nervous System:

Brain and spinal cord of vertebrates




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, EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
PNS - Answer✔✔-Peripheral Nervous System: All nerves and neurons that lie

outside of the spinal cord and brain

CSF - Answer✔✔-Cerebral Spinal Fluid:

Clear and free fluid that fills ventricular system of central nervous system (salt-water)

TTX - Answer✔✔-Tetrodotoxin:

Found in pufferfish, irreversibly blocks sodium gated channels

AHP - Answer✔✔-Afterhyperpolarization:

When the cell overshoots the resting membrane due to the high permeability to

potassium as both leak and ion gated channels are open

EPSP - Answer✔✔-Excitatory Postsynaptic Potential:

Causes dendrite to depolarize, due to sodium moving into the cell, does cause firing of

action potential on postsynaptic cell

IPSP - Answer✔✔-Inhibitory Postsynaptic Potential:

Causes dendrite to hyperpolarize, due to chlorine moving into the cell, does not cause

firing of action potential on postsynaptic cell

GABA - Answer✔✔-Gamma-aminobutyric acid:

Most common inhibitory neurotransmitter, opens chlorine gated channels

VPL - Answer✔✔-Ventral Posterior Lateral Nucleus:

Somatosensory part of the thalamus which receives signal from dorsal column nuclei

cGMP - Answer✔✔-cyclic Guanosine Monophosphate:




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