Read volume and time from labelled points, calculate the gradient or breaths per minute and apply dead-space or tidal-volume values with consistent units.
The diagram shows a spirometer that can be used to investigate human lung function.
A student used a spirometer to investigate the consumption of oxygen of a group of volunteers.
The graph shows a spirometer trace from one volunteer breathing at rest.
The line PQ indicates the oxygen consumption. Volume of air / dm ^3 Calculate the rate of oxygen consumption between P and Q. Give your answer with appropriate units.
