Respiration How do we measure respiration? National 4/5 Biology Respiration How do we measure respiration?

Recap

What are we learning today? We are learning to: Discuss how to measure the process of respiration Explain the use of different respirometers Interpret the results of respirometer experiments Predict the results of respirometer experiments Success criteria: - bubble movement indicates use of oxygen - Controlled variables e.g. temperature

Respirometers Respirometers are devices used to measure the rate of respiration of a living organism under specific conditions Many variables have to be controlled whilst carrying out these experiments A control experiment must also be set up to show the effect of the variable being investigated

Different respirometers For each of the respirometers you will see in the following slides think about the following: - how the respirometer works - what the respirometer is measuring - what results you would expect to see

Different respirometers

Questions Collect Intermediate 2 textbook p81 – 82 Answer questions 7 and 10