Question

Given these parameters, what is the AG for K ion transport into the frog muscle cell in the presence of Ach? Dr. Knowsalot smiles and nods. "Good," she says. "Now let's see whether K+ ions pass through the open Ach receptors into the cell. As you might remember, these channels are permeable to Na+, K+, and Ca2+. For a typical frog muscle cell, the concentration of K+ is roughly 124 mM inside the cell and 2.30 mM outside the cell." ·AG= kJ/mol Remember, to calculate AG for an ion, you simply add the equations for the chemical and electrostatic components together. 10 m As mentioned earlier, a typical animal cell resting membrane potential is -60 mV, and this process occurs at body temperature, which is 310 K.

Answer 1

Givens - I charge on k®(2=1) inside) = 124 mm ko coutside) = 2.30mm AVD-60mv , Ts 310k R = 8.3 145/mod-k Cinside + ZFAV AG = R1 log Cinside + ZFAV O Coutside To Temperature in kelin Cinside & Coutside conch of ko y charge on molemle F = 96.5 kJ/molv .. AV = Electrical potential difference puting all the values for ke we have AG = 8.314 J x 310K log124MM melk 230 mm + (+1) 96.5 KT_X (-60mv) X10 V mozav coom 10 V im v 03 OG = 2,577-34 J_x1.731 - 96-56J X103J 60 x103 v mol IET molto 0G = 4,461.38 h - 5,790 mm of DG = -1328.6 med TJ 0% DG = -1328.62 J X103 kJ = -1.320 kJ mol IJ mol so -1.328 FI mol