Which of the following is the most important contributor to the difference between the resting membrane potential and the equilibrium potential of potassium?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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An investigator is studying the electrophysical properties of gastrointestinal smooth muscle cells using microelectrodes. He
measures the resting membrane potential of a cell to be -70 mV. The equilibrium potentials of different ions involved in
generating the membrane potential are shown.
ENa
Ek
Eca
EM²
Ecr
+65 mV
-85 mV
+120 mV
+10 mV
-85 mV
Which of the following is the most important contributor to the difference between the resting membrane potential and the
equilibrium potential of potassium?
Transcribed Image Text:An investigator is studying the electrophysical properties of gastrointestinal smooth muscle cells using microelectrodes. He measures the resting membrane potential of a cell to be -70 mV. The equilibrium potentials of different ions involved in generating the membrane potential are shown. ENa Ek Eca EM² Ecr +65 mV -85 mV +120 mV +10 mV -85 mV Which of the following is the most important contributor to the difference between the resting membrane potential and the equilibrium potential of potassium?
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