Diffusion happens naturally and so does not require energy. Substances like oxygen, carbon dioxide and glucose move in and out of cells by diffusion. If I spray a little perfume over here, ...

Essential conditions, however, for diffusion respiration are a high percentage of oxygen in the lungs and ... Bohr effect produced by retention of carbon dioxide, with respiratory acidosis and ...

Gas permeation data for the precursor polymers were not available; data for FEP perfluorinated ethylene-propylene co-poplymer at 25 C are given as an approximation: hydrogen = 14; helium = 40; ...

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by ...

Plants primarily use two methods to get rid of excretory products: Diffusion: Many plants secrete waste products, such as carbon dioxide and oxygen, directly into the air through their leaves.