Describe and explain two ways in which alveoli in the mammalian lung are adapted for efficient gaseous exchange

  1. Alveoli in the mammalian lung are thin walled to allow the quick passage of gases, for example oxygen and carbon dioxide.

  2. Alveoli in the mammalian lung have a large surface area which allows for the diffusion of multiple gas molecules simultaneously, thus increasing the speed of diffusion across their surface. 

GA

Related Biology A Level answers

All answers ▸

Briefly describe the steps of DNA replication and the enzymes involved.


Describe the process that allows an action potential to be passed across a synapse in the parasympathetic nervous system.


What factors affect the speed at which an action potential travels?


Explain how two populations of organisms may develop into two separate species.