Title: Respiratory System
Date: 14 November 2011
(a) To determine the effect on breathing of voluntary hyperventilation.
(b) To investigate the effect on the respiratory pattern of rebreathing expired gas.
(c) To study the relationship between breathing and heart rate.
In this experiment , we record the breathing movements with a respiratory belt transducer fastened around the abdomen . We investigate various aspects of breathing , including the ability to hold the breath , hyperventilation , re-breathing , and the relation between breathing and heart rate . Breathing is pump oxygen into our lung through inhalation and removed carbon dioxide from the lung through exhalation. Breathing movements can be made voluntarily . However , if no conscious attention is focus on breathing , rhythmic muscle contractions will occur spontaneously .
1. The respiratory belt is fasten around the abdomen of a volunteer student . The transducer is at the front of the body , level with the navel and tightened sufficiently that it remains under tension even when the subject fully exhales .
2. Connected the plug on the respiratory belt transducer cable to input 1 on the front of the power lab .
1. ‘Start’ is clicked.
2. The volunteer is asked to breathe rapidly for a few seconds, and then to breathe slowly. The breath rate channel is examined, there should be obvious changes in rate.
3. A comment is entered: ‘Baseline 1’ in the slow breathing region of the data.
4. ‘Add’ is clicked.
5. 2-3 minutes of normal, quiet breathing are recorded and the trace is observed.
6. A comment “inhale, hold” is entered.
7. ‘Add’ is clicked, and the volunteer is asked immediately to take a deep breath and the breath is hold in for as long as possible.
8. The comment: “breathe” is entered.
9. When the volunteer begins to breathe again, ‘Add’ is clicked.
10. A normal (baseline) breathing...