... of solutes. FACILITATED DIFFUSION: Utilizes membrane protein to allow charged molecules to freely diffuse in and out of the cell. The channels come into greatest use with small ions like K+, Na+, Cl-. The speed of facilitated transport is limited by the number of protein channels available, whereas the speed of diffusion is dependent only on the concentration gradient. Facilitated Diffusion: Carrier ... ...

• Word Count: 954
• Approx Pages: 4
• Grade Level: Undergraduate

... and carrier mediate process. On the other hand, the exocytosis process is a movement of molecules out of cell, for instance, secretion of mucus. Another type of active transport is the Na+ and K+ pump and the proton pump where the protein carrier serves as the transfer medium. Another function of the membrane cell is to communicate with other cell and receiving signals ... ...

• Word Count: 936
• Approx Pages: 4
• Grade Level: Undergraduate