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Chapter 39: Q.11 (page 1147)

Restrictive airway diseases ________.

a. increase the compliance of the lung

b. decrease the compliance of the lung

c. increase the lung volume

d. decrease the work of breathing

Short Answer

Expert verified

The correct answer is (b) decrease the compliance of the lung.

Restrictive airway diseases decrease the compliance of the lung.

Step by step solution

01

Step 1. Introduction

Restrictive lung disease, a decrease in the total volume of air that the lungs are able to hold, is often due to a decrease in the elasticity of the lungs themselves or caused by a problem related to the expansion of the chest wall during inhalation.

02

Step 2. Explanation for the correct answer

(b) decrease the compliance of the lung.

  • In a restrictive lung disease, the compliance of the lung is reduced, which increases the stiffness of the lung and limits expansion.
  • In these cases, a greater pressure than normal is required to give the same increase in volume.
03

Step 3. Explanation for the incorrect answer

a. increase the compliance of the lung

  • Restrictive airway diseases does not increase the compliance of the lung. Hence this option is not correct.

c. increase the lung volume

  • Restrictive airway diseases does not increase the lung volume. Hence this option is not correct.

d. decrease the work of breathing

  • Restrictive airway diseases does not decrease the work of breathing. Hence this option is not correct.

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Most popular questions from this chapter

The majority of oxygen in the blood is transported by ________.

a. dissolution in the blood

b. being carried as bicarbonate ions

c. binding to blood plasma

d. binding to hemoglobin

The total lung capacity is calculated using which of the following formulas?

a. residual volume + tidal volume + inspiratory reserve volume

b. residual volume + expiratory reserve volume + inspiratory reserve volume

c. expiratory reserve volume + tidal volume + inspiratory reserve volume

d. residual volume + expiratory reserve volume + tidal volume + inspiratory reserve volume

How would paralysis of the diaphragm alter inspiration?

a. It would prevent contraction of the intercostal muscles.

b. It would prevent inhalation because the intrapleural pressure would not change.

c. It would decrease the intrapleural pressure and allow more air to enter the lungs.

d. It would slow expiration because the lung would not relax.

Alveolar ventilation remains constant when ________.

a. the respiratory rate is increased while the volume of air per breath is decreased

b. the respiratory rate and the volume of air per breath are increased

c. the respiratory rate is decreased while increasing the volume per breath

d. both a and c

Which of the following statements is false?

a. In the tissues, PO2 drops as blood passes from the arteries to the veins, while PCO2 increases.

b. Blood travels from the lungs to the heart to body tissues, then back to the heart, then the lungs.

c. Blood travels from the lungs to the heart to body tissues, then back to the lungs, then the heart.

d. PO2 is higher in air than in the lungs.
See all solutions

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