EXPIROGRAPH TRACE 1000 ml 1 sec 1 min Chart speed = 60 mmmnin Chut speed - 1200 mm mmin
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/>1.    


From Figure 4.2, complete the following calculations. 8 marks.



a.    Respiration Rate (RR) = ____ breaths per minute (breaths.min-1)


b.    Tidal volume (VT) = ____ L


c.    Minute respiratory volume (VE): ____ L.min-1


d.    Expiratory Reserve Volume (ERV)  = ­­­­ ____ L


e.    Inspiratory Reserve Volume (IRV)  = or ____ L


f.     Vital Capacity (VC)    = ____L


g.    Oxygen consumed per minute (VO2)                 = ____ L.min


h.    Forced Expiratory Volume (FEV1)       = ____ L




2.    Describe how restrictive and obstructive conditions would alter FEV1/FVC (increase/decreased/no change). 2 marks



3.    At rest, explain whether O2 or CO2 is the biggest factor in determining respiratory rate and breath holding? In your answer, you must include hydrogen ions and chemoreceptors. 2 marks





4.    When re-breathing into a paper bag, what happened to respiratory rate and breath hold? Are these results expected, and what is the physiological reason for this? 2 marks





5.    Would hyperventilation increase or decrease your ability to hold your breath. Explain the physiology behind your answer. 2 marks

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EXPIROGRAPH TRACE
1000 ml
1 sec
1 min
Chart speed = 60 mmmnin
Chut speed - 1200 mm mmin

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