For the following questions, use an ICD-9-CM code book to select the appropriate code(s) for the diagnostic statements given

The word root/combining form that means brain is:

a. encephal/o. b. cerebr/o. c. both a and b. d. heme/i

What is the benefit of pulmonary rehabilitation in patients with moderate to severe COPD?

a. Improves exercise tolerance. b. Improves FEV1. c. Improves lung function. d. Improves survival.