Question

Gaseous exchange is held by ________

(a) osmosis

(b) simple diffusion

(c) facilitated diffusion

(d) co-transport

I had been asked this question in my homework.

My doubt is from Exchange of Gases in portion Breathing and Exchange of Gases of Biology – Class 11

Answer 1

The correct option is (b) simple diffusion

For explanation I would say: Gaseous exchange is a passive process. It is held by simple diffusion. Diffusion pressure for every gas is called partial pressure. At the time of diffusion, gases move from high partial pressure to low partial pressure.