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2. Write a paragraph of 3-5 sentences answering the following questions. Your response should first answer the question and then go onto state physiological interpretations behind your answer. Paragraphs that demonstrate complete and thorough reasoning will receive full points. Assume a cell has a membrane potential of -70 mV and a CI-equilibrium potential of-81 mV. If the cell membrane is permeable to Cl-, will there be net movement of Cl- into or out of the cell? Explain your answer

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Answer #1

Cl- will tend to move out of the cell.

At - 70 mV (membrane potential and – 81 mV equilibrium potential of Cl-, electrical potential difference is not quite equal, and it is opposite to concentration gradient. So, Cl- moves out from the cell.

If the equilibrium potential and membrane potential could be the same then there will be no net ion movement.

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