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?

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

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

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