KROK 1 2021 – Question 2 · KROK (Medicine) · Physiology
In an experiment on an isolated squid giant axon submerged in a salt solution, the extracellular potassium ions concentration was increased to the level of the intracellular potassium ions concentration. What changes in the membrane potential will occur in this case?
- A. Potential remains unchanged
- B. Potential first decreases and then increases
- C. Potential increases
- D. Potential decreases
- E. Potential disappears
Hint
Consider what happens to the potassium equilibrium potential, which largely sets the resting membrane potential, when the potassium gradient across the membrane is abolished.
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