Author Question: Vital capacity is the sum of which of the following? 1. Residual volume 2. Inspiratory capacity ... (Read 125 times)

nramada · **on:** Jul 16, 2018

Vital capacity is the sum of which of the following?

1. Residual volume
2. Inspiratory capacity
3. Expiratory reserve volume
4. Inspiratory reserve volume
5. Functional residual capacity
a. 2 and 3 c. 2 and 5
b. 1 and 4 d. 3 and 4

Question 2

The results of pulmonary function testing show a normal total lung capacity and decreased, but reversible, FEV1 and FEV25-75. The patient is a 22-year-old, nonsmoking man with a history of intermittent noisy breathing.

Which of the following is most likely the cause of his problem?
a. Asthma c. Pulmonary fibrosis
b. Emphysema d. Severe restrictive pulmonary disease

taylorsonier · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
The vital capacity is equal to the sum of the inspiratory capacity plus the expiratory residual vol-ume.

Answer to Question 2

ANS: A
Asthma is a disease that shows reversibility in the FEV1 and FEV25-75. This reversibility, coupled with the fact that he is an otherwise healthy, nonsmoking, 22- year-old with a history of inter-mittent noisy breathing, makes asthma the best choice as the most likely cause of the problem.