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

NK cells kill abnormal cells by secreting ________, which kill the cells by creating large pores in their cell membranes

A) perforates B) perforines C) perforins D) perforations

You are examining the expiratory flow tracing during the patient's forced vital capacity (FVC) maneuver. At what point during the exhalation can you generally begin to see flow from the bronchioles?

a. Beyond 30% b. Beyond 50% c. Beyond 70% d. Beyond 90%