This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Fick's law, flux of Geomembrane increased in 
Select and explain. 
A. Concentration across, B. Temperature, C. Increased size of molecule, D. Area
A: Concentration across
Answer: A: Concentration across 
Explanation: There is a net flux of solute paicles from areas of high to areas of low concentration. The time required for equilibrium by diffusion is propoionate to the square of the diffusion distance. The magnitude of the diffusing tendency from one region to another is directly propoionate to the cross-sectional area across which diffusion is taking place and the concentration gradient, or chemical gradient, which is the difference in concentration of the diffusing substance divided by the thickness of the boundary(Fick's law of diffusion).Thus,J = -DA Dc/Dxwhere J is the net rate of diffusion, D is the diffusion coefficient, A is the area, and D c/ D x is the concentration gradient. (REF.Ganong's review of medical physiology 23rd Edition page no.5)