Describe (or draw) an example of diffusion down a concentration gradient.

Which of the following does not accurately describe a channel or a carrier?

Which type(s) of molecules cannot enter/exit the cell via simple diffusion and require facilitated diffusion?

Compare and contrast the following:

a. simple diffusion and facilitated diffusion

b. active transport and facilitated diffusion

c. active transport and group translocation

Complete the table by answering yes or no for each question. <IMAGE>

Which of the following processes includes all of the others?

The difference between simple and facilitated diffusion is that facilitated diffusion:

Which of the following does not accurately describe a channel or a carrier?