Gas Exchange in the Aquatic Salamander Known as the Axolotl

Question

Gas exchange in the aquatic salamander known as the axolotl is correctly described as
A) active transport to move oxygen into the salamander from the water.
B) carrier-mediated transport to move oxygen into the salamander from the water.
C) facilitated diffusion of carbon dioxide from the salamander into the water.
D) simple diffusion of oxygen into the salamander from the water.
E) active transport of carbon dioxide from the salamander into the water.

Accepted Answer

Axolotl gas exchange occurs through simple diffusion of oxygen into the salamander from the water. This is due to the fact that axolotls have a thin and porous skin which allows for gas exchange to occur across their skin.