Question 5 1.43 pts Did you notice that during the action potential the neuron m

Question

Question 5 1.43 pts Did you notice that during the action potential the neuron membrane potential reaches -90mV and stops? How/why does it stop at -90mV? Why doesn't it get more negative than -90mV? Hint: When the voltage-gated K+ channels are open on a neuron, there are so many voltage-gated K+ channels open that in reality you can think of the cell as being only permeable to K+. It's the main ion moving Based on this and what we talked about on Wednesday (Nernst equation, electrochemical gradient, etc.), answer the question. 2 sentences and 30 words max. Short and sweet.

Explanation / Answer

There is presence of tandem pore domain or potassium leak channel through which potassium can leak even in resting cell.

High ration of potassium inside to outside i.e.35:1.the nernst potential corresponding to this ratio is -90mv because the logarithm of 35 is 1.54 and this multipied by -61mv is -94mv.therefore if potassium is the only factor causing resting potential inside the fiber would be -90mv.

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