Facillitated diffusion: Large molecules and charged ions pass through the phospholipid bilayer with the help of CHANNEL PROTEINS.
Channel proteins are lined with charged particles, which help the passage of ions such as Na, K, HCO and Cl.
This type of transport DOES NOT REQUIRE ENERGY.
Diffusion: net movement of substances from a region of higher concentration to region of lower concentration.
It is a passive process because again, it DOES NOT REQUIRE ENERGY.
Small, lipid-soluble molecules can diffuse accross the phospholipid bilayer.
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