What is the energy released during respiration used for?

The energy released is stored in form of ATP which is then later used for different purposes such as

- movement - eg muscle contraction

- active transport of substances in/out of the cell thru the cell membrane

- synthesis of complex organic molecules (eg proteins) from simpler ones known as anabolism.

And many many other roles.

Using your muscles, Growth and repair cells, building smaller molecules from smaller ones, i. e