Several methods of indirectly measuring rate of cellular respiration in organisms, one involves monitoring temperature changes (since the process is exergonic), another is to measure either oxygen consumption or carbon dioxide production
Respirometers are devices measuring these types of gas volume changes and so provide information about rate of cellular respiration
A) closed tap
B) Gauze
C) Insect
D) Filter Paper
E) Sodium hydroxide
F) Manometer
G) U-tube
H) coloured liquid
I) Sodium hydroxide
J) Filter Paper
K) Glass beads
L) mass
M) insect
Sodium hydroxide (or potassium hydroxide) absorbs all CO_2 from apparatus in beginning; respiring insect uses O_2, pressure reduces in tube A and the manometer level nearest to insect moves up
Any CO_2 excreted is absorbed by sodium hydroxide solution, and syringe is used to return manometer fluid levels to normal; oxygen volume used is calculated by measuring gas volume needed from syringe to return levels to original
