Rats are treated with either thyroxin or thiouracil and

compared to control rats.  Following

treatment, their thyroid glands are examined at the microscopic level, with

representative images shown above.  The

next 5 questions are related to these results:

In the spirometry class, you measured Forced Vital Capacity (FVC). Which one of the following best describes the manoeuvre that the subject performed in order to measure FVC? Tidal breathing followed by:

The image below

shows the airflow and volume captured during the spirometry class. Which one of

the following options is most correct?

The trace below

was obtained from a normal subject during the spirometry class. It shows resting tidal breathing and two occasions where the

subject was given specific instructions about their breathing. Labels on the

axes have been enlarged. The dashed lines indicate 0.