Question

complete the table to compare simple diffusion and facilitated diffusion. molecules move from areas of high concentration to areas of low concentration molecules pass directly through the phospholipids in the cell membrane molecules pass through proteins in the cell membrane large or charged molecules can move across the cell membrane molecules move across the cell membrane without needing cellular energy

Explanation:

• Both simple and facilitated diffusion are passive transport processes. So, the statement "molecules move from areas of high concentration to areas of low concentration" and "molecules move across the cell membrane without needing cellular energy" apply to both.
• In simple diffusion, molecules pass directly through the phospholipids in the cell membrane.
• In facilitated diffusion, molecules pass through proteins in the cell membrane. Also, facilitated diffusion allows large or charged molecules (which cannot pass through the phospholipid bilayer easily) to move across the cell membrane.

Answer:

	simple diffusion	facilitated diffusion
molecules pass directly through the phospholipids in the cell membrane	✔️	❌
molecules pass through proteins in the cell membrane	❌	✔️
large or charged molecules can move across the cell membrane	❌	✔️
molecules move across the cell membrane without needing cellular energy	✔️	✔️