Transport Mechanisms in Cells

__________________________ is the movement of materials across the cell membrane without using cellular energy.

2. __________________________ is the process by which particles move from an area of high concentration to an area of lower concentration.

3. __________________________ is the process by which molecules that cannot directly diffuse across the membrane pass through special protein channels.

4. __________________________ is the facilitated diffusion of water through a selectively permeable membrane.

5. __________________________ are water channel proteins that allow water to pass through cell membranes.

6. Two adjacent solutions are __________________________ if they have the same concentrations of solute.

7. __________________________ solutions have a higher concentration of solute compared to another solution.

8. __________________________ solutions have a lower concentration of solute compared to another solution.

10. __________________________ is the movement of materials against a concentration difference which requires energy.

Which term refers to the condition that exists when no net change in concentration results from diffusion?

• concentration

• equilibrium

• osmosis

• randomness