Exercise 3: Membranes

5. Which bag had the highest rate of osmosis? How can you tell? Why?Task 2: Brownian MovementBrownian movement is the random movement of molecules in response to heat. Thisphenomenon can be observed by placing a Carmine red suspension (Carmine red dye mixed with soap)under the microscope.1. Place a small drop of the Carmine red suspension on a clean slide. Add a coverslip.2. Examine this slide with the microscope. Once in focus, look for movement (vibration) of the reddye molecules. Be patient, it may take the microscope light a few minutes to heat up your slide.Describe you observations in the space belowQuestions:6. What factors control the Brownian Motion?7. What direction are the particles moving?8. How does Brownian motion affect the rate of diffusion?______________________________________________________________________________Task 3 - DIFFUSION AND DIFFERENTIALLY PERMEABLE MEMBRANESDiffusion is the passive movement of a substance from an area of high concentration to an area oflow concentration (Fig. 8). The speed at which movement occurs depends on the concentration gradientbetween the two areas but can also be affected by the weight/size of the substance.6