3.2.3 Transport across cell membranes

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Last updated 3:23 PM on 5/24/26
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5 Terms

1
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Describe the process of facilitated diffusion

movement of polar/charged molecules down a concentration gradient via carrier/channel proteins

2
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What is the role of a channel protein?

pore which allows charged substances to diffuse through

3
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What is the role of a carrier protein?

binds to specific molecule (polar) and undergoes confirmational change to transport it

4
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Describe the process of active transport

movement against concentration gradient via carrier protein using ATP

5
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What are microvilli?

folded self-surface membrane