Section UNIT REVIEW Check Your Understanding Critical Thinking and Application Q

Question

Section UNIT REVIEW Check Your Understanding Critical Thinking and Application Questions 1 The condition emplysema results in loss of elastic recoil of the lung tissue. Would this make inspiration or expiration difficule? Explain. 2 Certain chest deformities prevent normal expansion of the chest. Explain why this makes ventilation difficult in terms of pressure and volume A male patient presents with the following respiratory volumes and capacities: TV -500 ml, ERV 1,200 ml, IRV - 1,100 ml. What is this patient's VC? Are these values normal? If not, are they more consistent with an obstructive or restrictive disease pattern? Explain. 2 Respiratory System PhysiologyUNIT 2215

Explanation / Answer

1) Inspiration is an active process that needs the help of inspiratory muscles like external intercostals and diaphragm. Expiration is a passive process that occurs as a result of elastic recoiling of lung tissues. In emphysema, there is loss of elastic recoiling of lung tissues. Therefore, expiration is more affected than inspiration.

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