7.1 Flashcards by A level Year 2 | Brainscape

Q

Why diffusion alone is sufficient?

A

metabolic activity is low

large SA:V ratio

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Q

SA:V ratio

A

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Q

Specialised exchange surfaces

A

increased surface area

thin layers

good blood supply / ventilation

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Q

increased surface area

A

provides area needed for exchange

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Q

Thin layers

A

short diffusion distance

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Q

Good blood supply / ventilation

A

maintain concentration / diffusion gradient

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