Stimulation of the irritant receptors in the lung can result in which of the following? 1. Bronchoconstriction 2. Coughing 3. Narrowing of the glottis
a. 1 only
b. 1 and 3 only
c. 1, 2, and 3
d. 1 and 3 only
ANS: C
Irritant receptors are responsible for laryngospasm, coughing, and slowing of the heartbeat. En-dotracheal intubation, airway suctioning, and bronchoscopy readily elicit vagovagal reflexes. Physical stimulation of the conducting airways, as with suctioning or bronchoscopy, may cause a severe case of bronchospasm, coughing, and laryngospasm.
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