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Lana71 [14]
3 years ago
13

what types of molecules need more help to get through the cell membrane? What helps them get through?

Biology
1 answer:
Slav-nsk [51]3 years ago
7 0
Nonpolar and small polar molecules<span> can pass </span>through the cell membrane<span>, so they diffuse </span>across<span> it in response to concentration gradients. Carbon dioxide and oxygen are two </span>molecules<span> that undergo this simple diffusion </span>through<span> the </span>membrane<span>. The simple diffusion of water is known as osmosis.</span>
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