Why is the volume of co2 production rather than o2 uptake an adequate measure of respiration?

To measure the rate of respiration, scientists usually utilized the volume of carbon dioxide produce rather than the volume of oxygen that was uptake. The volume of carbon dioxide is used for measuring the rate of respiration because it is difficult to gauge small changes in the concentration of oxygen. Also due to the presence of oxygen in the atmosphere, atmospheric oxygen can easily be introduce into the samples been used thus, making the results of the experiment invalid. The rate of respiration is tightly coupled together with the rate of cell metabolism, thus measurement of respiration via measurement of carbon dioxide also allows scientists to easily monitor the metabolic states of the tissues.

explanation:

the largest database of organic compounds lists about 10 million substances, which include compounds originating from living organisms and those synthesized by chemists. the number of potential organic compounds has been estimated at 1060—an astronomically high number. the existence of so many organic molecules is a consequence of the ability of carbon atoms to form up to four strong bonds to other carbon atoms, resulting in chains and rings of many different sizes, shapes, and complexities. the simplest organic compounds contain only the elements carbon and hydrogen, and are called hydrocarbons. even though they are composed of only two types of atoms, there is a wide variety of hydrocarbons because they may consist of varying lengths of chains, branched chains, and rings of carbon atoms, or combinations of these structures. in addition, hydrocarbons may differ in the types of carbon-carbon bonds present in their molecules. many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. we use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil. the familiar plastics polyethylene, polypropylene, and polystyrene are also hydrocarbons. we can distinguish several types of hydrocarbons by differences in the bonding between carbon atoms. this leads to differences in geometries and in the hybridization of the carbon orbitals.