In the picture below ions, or charged particles, are being pumped through the cell membrane. Why do they require energy to transport across the membrane?

well if i had a picture it wouldve helped more but typically if a particle is moving into the cell, it doesnt require any energy, however moving particles outside of a cell requires a large amount of atp.

Explanation:

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.