Question

gas exchange in the lungs happens through * 1 point
high co2
concentration
in blood
low co2
concentration

facilitated diffusion
simple diffusion
osmosis

Explanation:

Gas exchange in the lungs occurs based on concentration gradients. Simple diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. In the lungs, \(CO_2\) moves from the blood (high \(CO_2\) concentration) to the alveoli (low \(CO_2\) concentration), and \(O_2\) moves from the alveoli (high \(O_2\) concentration) to the blood (low \(O_2\) concentration). Facilitated diffusion requires transport proteins (not relevant here as gases like \(O_2\) and \(CO_2\) pass through the lipid - bilayer of alveolar and capillary membranes easily). Osmosis is the movement of water across a semi - permeable membrane (not related to gas exchange of \(O_2\) and \(CO_2\)).

Answer:

Simple diffusion