Question 22 The epiglottis is composed of smooth muscle. True False Question 23

Question

Question 22 The epiglottis is composed of smooth muscle. True False Question 23 During an asthma attack the O all of these answers and correct o Bronchiole smooth muscle contracts which reduces the diameter of the airways Alveoli collapse and air no longer travels into them Bronchioles dilate resulting in not enough air pressure in the air passageway D Question 24 Select the correct statement about the physical factors influencing pulmonary ventilation O Surfactant helps increase alveolar surface tension. o As alveolar surface tension increases, additional muscle action will be required 0 A lung that is less elastic will require less muscle action to perform adequate ventilation. 0 A decrease in compliance causes an increase in ventilation. D Question 25 The parietal pleura lines the thoracic wall. O True False

Explanation / Answer

22. Epiglottis composed of smooth muscle

False

It is composed of elastic cartilage.

23. During an asthma attack

B. The bronchiole smooth muscles contract which reduces the diameter of airways

24. Statement D is correct ,i.e

A decrease in compliance causes increase in ventilation

Compliance means the capacity of lungs to recoil and stretch when this decreases the person have to put extra effort in the form of increased breathing to meet the oxygen needs.

25. The parietal pleura lines the thoracic cavity

True.

The visceral one lines the lungs.

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