1
Q
What is a Spirometer?
A
Is a piece of equipment that can be used to investigate breathing.
2
Q
How does a spirometer work?
A
- The person breathes in and out of their mouth via the mouthpiece
- air is trapped between the enclosed chambers between the float and water
3
Q
How does a spirometer work? - when breathing in
A
- when breathing in, the volume of air in the chamber decreases and float drops
4
Q
How does a spirometer work? - when breathing out
A
- when breathing out, the volume of air inside the chamber increases and the float rises.
- the float is attached to a pen which writes on the paper on the revolving drum, recording the breathing movements.
- when soda lime is used, the carbon dioxide breathed out into the mouthpiece is absorbed and it does not reach the chamber.
5
Q
What is Tidal volume?
A
the volume of air in each breath (about 0.4dm^3)
6
Q
What is Vital capacity?
A
the maximum volume of air that can breathed in and out in one breath
7
Q
What is Breathing rate?
A
How many breaths are taken per unit time
8
Q
What is oxygen uptake?
A
the rate at which the person uses up oxygen
