use the nernst potential equation for potassium to explain what happens to an excitable cell subjected to hyperkalemic conditions (high levels of extracellular potassium). use the following values for the nernst equation: the constant (kt/q) is equal to 61.5 mv (human cell, normal body temperature), the intracellular concentration of potassium is equal to 150 meq, and the extracellular concentration of potassium is 3.5 meq (normal) and 7 meq (hyperkalemic). how would you modify the cell membrane model we discussed this semester to reflect hyperkalemic conditions? nernst potential