What is defined as the absorption of oxygen and the release of carbon dioxide by cells?

Cellular respiration

Explanation:

Oxygen is required by the cell in the Krebs cycle as the ultimate proton acceptor (creating water an end product during making out ATPs). During the conversion of pyruvate from glycolysis to Acetyl-CoA that enters the Krebs cycle, the pyruvate is decarboxylated (or oxidized) hence creating carbon IV oxide as a byproduct.

in the first balloon when the balloon get warm the molecules begin to distribute to the wall of the balloon and the balloon will brust because of the tension caused.

In the second case when the bLlon get cold the molecules Will atract each other then the balloon will contract because of the attraction of the molecules in the balloon.