This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
Which of the following is not a consequence of stimulation of lung C fiber endings? 
Select and explain. 
A. Bronchoconstriction, B. Apnea, C. Rapid shallow breathing, D. Systemic vasoconstriction
D: Systemic vasoconstriction
Answer: D: Systemic vasoconstriction 
Explanation: Ans. D. Systemic vasoconstrictionStimulation of lung C fibers will cause bronchoconstriction, apnea, rapid shallow breathing, and skeletal muscle relaxation.