A spherical cell with diameter of 60 micrometers ("a", the radius, = 30 micrometers) has a surface
area of 1.1 x10^-4 cm^2. If it has a resting potential of -60 mV and it has an action potential that reaches +40 mV at its peak and -70 mV at its undershoot. What is the number of excess unit negative charges on the membrane at rest? By what percent must this change for the membrane potential to reach the undershoot (-70 mV)? To perform your calculations assume that the membrane has a capacitance of 1 microFarad/cm^2, and use that fact that there are 6.2 x 10^+18 unit negative charges/Coulomb of negative charge.
Recently Asked Questions
- Read the methods section below from "E3 ubiquitin ligase activity of the trifunctional ARD1 (ADP-ribosylation factor domain protein 1)." (Vichi, A. et. Al.,
- How do you prepare the 20 ml of STE buffer the authors used to dissolve the cells (show work)? ____________Tris ___________NaCl __________EDTA Method:
- Which of the following is NOT part of the epidermis?A.Stratum basale B.Papillary layer C.Reticular layer D.Two of the Above are NOT part of the epidermis E.All