Frog muscle cells and the solution bathing the cells contain ions at different concentrations. The concentrations of Na+, Ca²+, K+ and Cl¯ are shown in the table. The temperature is 25 °C. ion intracellular concentration (mm) Na+ 12 extracellular concentration 120 Ca²+ 1 x 10-4 3 K+ 155 10 CI- 4 62 (MM) The resting frog muscle membrane potential is determined by the equilibrium of K+ across the cell membrane. What is the voltage inside the frog cell if the outside solution is at zero volts?
Frog muscle cells and the solution bathing the cells contain ions at different concentrations. The concentrations of Na+, Ca²+, K+ and Cl¯ are shown in the table. The temperature is 25 °C. ion intracellular concentration (mm) Na+ 12 extracellular concentration 120 Ca²+ 1 x 10-4 3 K+ 155 10 CI- 4 62 (MM) The resting frog muscle membrane potential is determined by the equilibrium of K+ across the cell membrane. What is the voltage inside the frog cell if the outside solution is at zero volts?
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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Transcribed Image Text:Frog muscle cells and the solution bathing the cells contain ions at different concentrations. The concentrations of Na⁺, Ca²⁺, K⁺, and Cl⁻ are shown in the table. The temperature is 25 °C.
| Ion | Na⁺ | Ca²⁺ | K⁺ | Cl⁻ |
|-----|-----|-----|-----|-----|
| **Intracellular concentration (mM)** | 12 | 1 × 10⁻⁴ | 155 | 4 |
| **Extracellular concentration (mM)** | 120 | 3 | 10 | 62 |
The resting frog muscle membrane potential is determined by the equilibrium of K⁺ across the cell membrane. What is the voltage inside the frog cell if the outside solution is at zero volts?
Expert Solution
Step 1: Given,
The concentrations of Na+, Ca2+, K+, and Cl- are shown in the following table.
Temperature = 25 °C
| ION | Na+ | Ca2+ | K+ | Cl- |
| intracellular concentration (mM) | 12 | 1 X 10-4 | 155 | 4 |
| extracellular concentration (mM) | 120 | 3 | 10 | 62 |
The resting frog muscle membrane potential is determined by the equilibrium of K+ across
the cell membrane.
We have to find the voltage inside the frog cell if the outside solution is at zero volts.
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