#96 Using respirometers
A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide . They allow investigation into how factors such as age, chemicals or the effect of light affect the rate of respiration. There are various different types of respirometer. One type is shown in the diagram. Using a respirometer to measure the rate of uptake of oxygen The organisms to be investigated are placed in one tube, and non-living material of the same mass in the other tube. Soda lime is placed in each tube, to absorb all carbon dioxide. Cotton wool prevents contact of the soda lime with the organisms. Coloured fluid is poured into the reservoir of each manometer and allowed to flow into the capillary tube. It is essential that there are no air bubbles. You must end up with exactly the same quantity of fluid in the two manometers. Two rubber bungs are now taken, fitted with tubes as shown in the diagram. Close the spring clips...
Comments
Post a Comment