Define the resting membrane potential of a cell and describe the homeostatic steady state created by the selective permeability of the cell membrane. Describe the role of electrochemical gradients of specific ions, and the description of these gradients via the Nernst equation, in determining the membrane potential.
2. Diagram and describe the mechanism of insulin secretion as a representative model of integrated membrane processes. Include relevant transported substances, membrane proteins, ions, membrane potentials, and transport processes.