NREMT Advanced EMT Practice Test #4

Answer - A - Bronchoconstriction is brought on by chemical mediator release and results in an increase in airway resistance and wheezing. Stridor may be present, but is from laryngeal edema. This constriction of the airways in the lungs is due to the tightening of surrounding smooth muscle. A histamine release will occur that has cardiovascular, respiratory and integumentary manifestations. An acute reaction can occur from exposure via inhalation, absorption, or ingestion.