Equilibrium potential of calcium is: (A) -32mV, (B) +65mV, (C) -95mV, (D) +130mV
Answer is D. Applying the Nernst equation to external and internal calcium concentrations of 2.5 mM and 0.0001 mM, respectively, results in an equilibrium potential of +134 mV as shown below. (Ref: www.cvphysiology.com)