A whistling sound caused by obstruction of the air passageway associated with asthma is termed:

A) Cheyne-Stokes.
B) rale.
C) stridor.
D) wheeze.

A whistling sound caused by obstruction of the air passageway is typically associated with asthma and is referred to as a wheeze. Cheyne-Stokes refers to an abnormal breathing pattern characterized by alternating periods of deep and shallow breathing or cessation of breathing. Rales are rattling sounds that may be heard during inspiration and expiration and are associated with fluid in the airways. Stridor is a high-pitched wheezing sound that may be heard during inspiration and is associated with upper airway obstruction.