Apex Anesthesia: Unit 5 Pharmacology 2 Questions With Complete Solutions

Apex Anesthesia: Unit 5 Pharmacology 2 Questions With
Complete Solutions


Refer to picture.
Describe the components of the neuron and their functions.




Conduction velocity is a measure of how fast an axon transmits
the action potential.
CV is increased by:
-Myelination - the action potential skips along the nodes of
Ranvier (saltatory conduction)
-Large fiber diameter
What is conduction velocity, and how is it affected by
myelination and axon diameter?




Refer to picture of chart.
List the 3 different nerve fiber types.

,Compare and contrast them in terms of myelination, function,
diameter, conduction velocity, and block onset.




A-alpha myelination, function, diameter, velocity and block
onset myelination: heavy
function: motor and proprioception
diameter: 12-20 um
velocity: +++++
block onset: 4 th blocked (last)
A-alpha myelination, function, diameter, velocity and block
onset myelination: heavy
myelination: heavy
function: touch and pressure
diameter: 5-12 um
velocity: ++++
block onset: 4 th blocked (last)
A-Beta
myelination:
function:
diameter:
velocity:
block onset:
myelination: medium
function: muscle tone

,diameter: 3-6
velocity:+++
block onset: 3rd blocked
A-gama ( y)
myelination:
function:
diameter:
velocity:
block onset:
myelination: medium
function: fast pain, temp, and touch
diameter: 2-5
velocity: +++
block onset: 3rd blocked
A-delta (g)
myelination:
function:
diameter:
velocity:
block onset:
myelination: light
function: pregang ANS function
diameter: 3
velocity:++
block onset: 1st blocked
B fibers
myelination:

, function:
diameter:
velocity:
block onset:
myelination: none
function: post gang ANS function
diameter:0.3-0.13
velocity:+
block onset: 2nd blocked
C fibers, sympathetic
myelination:
function:
diameter:
velocity:
block onset:
myelination: none
function: slow pain, temp, touch
diameter:0.4-0.12
velocity:+
block onset: 2nd blocked
c fibers, Dorsal root
myelination:
function:
diameter:
velocity:
block onset: