Question

Oxygen and carbon dioxide move across respiratory membranes by (1 point)
facilitated diffusion.
active transport.
simple diffusion.
gated channels.

Answer 1

have you tried reading through your lessons?

Answer 2

yes i have i wouldnt be asking if i knew/found the answer

Answer 3

Passive diffusion : as solute movement down a concentration gradient ( from high to low concentration) this process doesn't use any energy for the gases to move.