You Perform a Series of Voltage-Clamp Experiments with 2 MM

question 37

Multiple Choice

You perform a series of voltage-clamp experiments with 2 mM extracellular calcium, 0.2 mM extracellular calcium and 0 mM extracellular calcium. You notice that the potassium current increases with each step. What is the origin of this increase?

• A) Decreased membrane potential
• B) Increased threshold potential
• C) Activation of calcium-activated sodium channels
• D) Activation of calcium-activated potassium channels
• E) Activation of calcium channels