Thank you so much. Great work. I received full credit for my portion of this group assignment. Please continue to keep up the great work and help me as much as possible.
Consider a typical cell at its resting membrane potential (rest Vm). The membrane temporarily becomes more permeable to Cl-.
Ecl = -65mV, resting Vm = -60mV
Part I: Electrochemical Gradient
Does a chemical force (gradient) exist, if so in what direction? (.5 point)
Does an electrical force (gradient) exist, if so in what direction? (.5 point)
What direction will the ion flow (said another way, what is the electrochemical gradient? (.5 point)
Draw your representation of what is occurring at questions 1 -3 above and explain your reasoning (explain the physiology taking place) for each gradient. (.5 point)
Part II: Membrane Potential and Equilibrium Potential
Would you expect the membrane potential to change and if so, what direction will the change be? (.5 point)
Would you expect the chloride equilibrium potential to change and if so, what direction will the change be? (.5 point)
Would you expect the membrane to depolarize, repolarize, hyperpolarize, or no change? Both explain in words and draw an appropriate graph to represent visually your answer. (.5 points)
If a cell were only permeable to one ion, would the Nernst potential for that ion (Ex) and the resting membrane potential be the same or different (if so how are they different)? (.5 points)
Explain your answer (1 points)
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