Aug 19, 2019 · A medical condition known as dopamine transporter deficiency syndrome, or infantile parkinsonism-dystonia, occurs when mutations in the SLC6A3 gene affect how the dopamine transporter proteins... Hydrophilic, polar or charged molecules cannot cross the membrane. Factors Affecting Facilitated Diffusion. Brownian motion is the force behind the diffusion of fluids. The main factors affecting the process of facilitated diffusion are: Temperature- As the temperature increases, the movement of the molecules increases due to an increase in energy.
Connection for AP ® Courses. Diffusion, osmosis, and active transport are used to transport fairly small molecules across plasma cell membranes. However, sometimes large particle Diffusion: Random movement of molecules that leads to a net movement of molecules from a region of high concentration to a region of low concentration. Fermentation: A chemical reaction by which carbohydrates, such as sugar, are converted into ethyl alcohol.