Osmosis process over a semi-permeable membrane (blue dots represent particles driving the osmotic gradient) - Source: Wikimedia. As mentioned earlier, both diffusion and osmosis occur through passive transport. Meaning, no additional energy is needed to drive them and they simply involve the...Osmosis and diffusion play essential, but distinct roles in the human body. Diffusion sees molecules in an area of high concentration move to areas with a lower concentration, while osmosis refers to the process by which water, or other solvents, moves through a semipermeable membrane, leaving other bits of matter in its wake. To investigate diffusion through student selected experimental setups. 2. To investigate osmosis through student selected experimental setups. 3. To predict the movement of water in experimental setups. Learning Goals 16 hours ago · Clamping the tubing of the drainage bag 3. Diffusion lab 14771. Tips and tricks. Lab Report on Osmosis and Diffusion Biology 1, Period 3 March 15, 2010 Lab Team: Jason Perez, Kicia Long, Chris McLemore Purpose: The purpose of this lab is to observe the acts of passive transport: diffusion and osmosis in a model membrane system. Diffusion Experiment Prepare a line graph of the diffusion diameter width of each substances using the data below obtained from holes 1 and 3. Time of diffusion in minutes should be graphed versus diameter of diffusion in mm. Calculate the rates of diffusion per minute and per hour. Results Time Diameter of solute Diffusion