gas exchange and breathing Flashcards
1
Q
what are unicellular organisms
A
they can rely on diffusion because they have a relatively large surface area compared to their volume
2
Q
what are multicellular organisms
A
they need transportr systems in order to transport essentials like oxygen and glucose to every cell
3
Q
what do multicellular organisms have
A
they have a small surface are to volume ratio and so diffusion would be slow to provide the necessary oxygen and glucose to every cell
4
Q
what is ventilation
A
ventilation or breathing is the process by which air is constantly moved into and out of the lungs
5
Q
what is inspiration or inhalation
A
is when air is forced into the alveoli because the pressure of the atmosphere is greater than the pressure inside the lungs
6
Q
A
