B4.5 Breathing And Gas Exchange Flashcards

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1
Q

what are Alveoli and how are they adapted to their function?

A

Site of gas exchange
Thin walls (one cell thick)- reduce diffusion distance but increases rate of diffusion
Large surface area- more reactions can occur in a given time
Constant blood flow- maintains a steep concentration gradients, so diffusion can continually occur

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2
Q

What can energy from repsiraiton be used for ?

A

Movement/ muscle contraction
Keeping warm
Active transport
Building larger molecules

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