Membrane Potential and Electrochemical Gradients (2A)
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QUESTION
What is the definition of an electrochemical gradient for an ion?
QUESTION
What change in
V
m
V_m
V
m
is called depolarization?
QUESTION
What is the typical resting membrane potential magnitude for many neurons?
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ANSWER
Approximately
−
70
mV
-70\ \text{mV}
−
70
mV
. This value arises from the balance of ion concentrations and permeabilities, particularly high K
+
^+
+
conductance.
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