REVIEW SHEET EXERCISE 1 Cell Transport Mechanisms and Permeability NAME: LAB TIME/DATE: 1. Match each of the definitions in Column A with the appropriate term in Column B. Column A
Column B __E__ term used to describe a solution that has a lower concentration of solutes compared to another solution _G___ term used to describe a solution that has a higher concentration of solutes compared to another solution _A___ the movement of molecules from an area of higher concentration to an area of lower concentration as a result of random thermal motion _D___ the movement of molecules across a membrane that requires the expenditure of cellular energy (ATP) _C___ the transport of water across a semipermeable membrane _F___ term used to describe two solutions that have the same concentration of solutes relative to one another __B__ the movement of molecules across a selectively permeable membrane with the aid of specialized transport proteins
a. diffusion b. facilitated diffusion c. osmosis d. active transport e. hypotonic f. isotonic g. hypertonic 2. What is the main difference between simple diffusion and facilitated diffusion? Simple diffusion moves molecules from an area of higher concentration to an area of lower concentration without an input of energy. Facilitated Diffusion follows the same rules as regular diffusion (higher to lower concentration and no energy input), but uses protein carrier molecules to allow substances that are fat soluble to diffuse through the cell membrane. 3. What is the main difference between facilitated diffusion and active transport? Facilitated Diffusion molecules move from a high concentration to a low concentration without the requirement of ATP. The movement of molecules AGAINST the concentration gradient with the use of energy (eg, ATP) 4. In the “Simple Diffusion” experiment, which solute(s) passed through the MWCO 20 membrane? None of the substances passed through the MWCO 20 membrane. The molecular weight cut...
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