A 7.6nm -thick cell membrane undergoes an action potential that follows the curv
ID: 2257845 • Letter: A
Question
A 7.6nm -thick cell membrane undergoes an action potential that follows the curve in the figure.
http://session.masteringphysics.com/problemAsset/1200621/4/23-45.jpg
What is the strength of the electric field inside the membrane just before the action potential?
What is the strength of the electric field inside the membrane at the peak of the depolarization?
A 7.6nm -thick cell membrane undergoes an action potential that follows the curve in the figure. http://session.masteringphysics.com/problemAsset/1200621/4/23-45.jpg What is the strength of the electric field inside the membrane just before the action potential? What is the strength of the electric field inside the membrane at the peak of the depolarization?Explanation / Answer
a)
-70*10^-3/7.6*10^-9 = 9.21*10^6V/m
b)
The magnitude of the field is the voltage difference divided by the separation: 40*10^-3/(7.6*10^-9) = 5.26*10^6V/m
, and is directed from the high potential to the low potential (the direction a positive charge would move between the potentials)
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