Reputation: 1571. E-filed in Early February and it took about 7 weeks to get my refund. It might have something to do with the amount as well. I got back $1,500 from the state which is probably more than most people get, so it could have taken longer for the larger payment.
Diffusion and Osmosis. Diffusion. -the process by which molecules spread from areas of high concentration, to areas of low concentration. Concentration gradient - a difference between concentrations in a space. Molecules will always move down the concentration gradient, toward areas of lesser concentration.
Diffusion is important in the transport (movement) of molecules into and out of the cell. Depending on the concentration gradient will be whether certain materials will either enter or leave cells by diffusion. The process of diffusion plays an important role in the enrty and exit of molecules in living cells.