B4.5 Breathing And Gas Exchange Flashcards
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
2
Q
What can energy from repsiraiton be used for ?
A
Movement/ muscle contraction
Keeping warm
Active transport
Building larger molecules