respiration practical Flashcards
1
Q
State the apparatus used to measure the rate of respiration of a small organism
A
respirometer
2
Q
why is soda lime added to the respirometer
A
to absorb co2 in the respirometer so that the only change in volume results from change in oxygen volume
3
Q
controlled variables
A
temperature, time, mass of soda lime
4
Q
calculation rate of respiration
A
rate of respiration = volume of oxygen consumed/ mass of organism
5
Q
state the source of error in this practical
A
animals activity sleep or awake
apparatus may not be airtight which may affect the movement of the dye
6
Q
how can the reliability be improved
A
repeating practical at least x3 and find mean volume of oxygen
