Investigating respiration (Edexcel GCSE Biology): Flashcards

Oxygen uptake by living organisms

Absorbs $CO_2$ produced during respiration

Control - same mass as organisms

$O_2$ uptake reduces gas volume in tube

$V = \pi \times r^2 \times d$

$\frac{\text{Volume}}{\text{Time}}$

$cm^3/min$

Rate of respiration increases

Enzymes work more efficiently at higher temps

To control temperature

Insects, maggots, woodlice, germinating peas

Corrosive - causes skin burns

Volume of oxygen taken up

Use digital manometer for better precision