What would the membrane potential be if the cell membrane suddenly became 10X more permeable to just sodium?

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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What would the membrane potential be if the cell membrane suddenly became 10X more permeable to just sodium? 

Ionic Composition Inside and Outside a Typical Mammalian Cell
Intracellular
Component Concentration (mm)
Cations
Na+
K+
Mg2+
Ca²+
H+
Anions
CI-
10
145
0.5
1 x 10-4
7 x 105 (pH = 7.2)
10
Extracellular
Concentration (mm)
150
52
1
4 x 10-5 (pH = 7.4)
110
Relative Permeability
0.02
1.00
0.50
Transcribed Image Text:Ionic Composition Inside and Outside a Typical Mammalian Cell Intracellular Component Concentration (mm) Cations Na+ K+ Mg2+ Ca²+ H+ Anions CI- 10 145 0.5 1 x 10-4 7 x 105 (pH = 7.2) 10 Extracellular Concentration (mm) 150 52 1 4 x 10-5 (pH = 7.4) 110 Relative Permeability 0.02 1.00 0.50
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