Damage to the pulmonary plexus that result in breathing rates that are normal or increased, but never decreased below normal indicates
A) the damage is most likely of the parasympathetic fibers.
B) the damage is most likely to the sympathetic fibers.
C) the damage is most likely to the sensory fibers.

Question

Quizplus · Accepted Answer

The pulmonary plexus contains both sympathetic and parasympathetic fibers. The parasympathetic fibers, when stimulated, generally cause a decrease in heart rate and can affect breathing rates by promoting constriction of airway smooth muscles, leading to decreased airflow. Damage to these fibers would remove this inhibitory effect, potentially leading to normal or increased breathing rates, but not a decrease below normal levels.

Damage to the Pulmonary Plexus That Result in Breathing Rates