Glucose is a molecule that is able to diffuse across the plasma membrane with a diffusion coefficient (D) of 3 x 10-8 cm2 per second.
a) If the concentration of glucose in plasma is 5mM, and the intracellular glucose concentration is negligible (i.e. 0mM), explain what is the rate of glucose diffusion (J) into the cell? Presume that the thickness of the plasma membrane is 10 nm