exercise_nervous_I_topic_4

exercise_nervous_I_topic_4 - The Nervous System: Membrane...

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The Nervous System: Membrane Potential 1. Record the intracellular and extracellular concentrations of the following ions (mM/L): Intracellular Extracellular Sodium (Na + ) Potassium (K + ) Chloride (Cl ) 2. Excitable cells, like neurons, are more permeable to ___________ than to ___________. 3. How would the following alterations affect the membrane permeability to K + Use arrows to indicate the change in permeability. a. An increase in the number of passive K +  channels ___________ b. Opening of voltage-gated K +  channels ___________ c. Closing of voltage-gated K +  channels ___________ 4. a. What acts as a chemical force that pushes K +  out of the cell? ___________ b. What force tends to pull K +  back into the cell? _____________________ 5. When the two forces listed above are equal and opposite in a cell permeable  only to K + , this is called the _________________________ potential for K
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exercise_nervous_I_topic_4 - The Nervous System: Membrane...

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