This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Evacuation of the urinary bladder and stool with profuse sweating is a feature of 
Select and explain. 
A. Mass reflex, B. Positive suppoive reaction, C. labyrinthine righting reflex, D. Stretch reflex
A: Mass reflex
Answer: A: Mass reflex 
Explanation: When even a relatively minor noxious stimulus is applied to the skin it may activate autonomic neurons and produce evacuation of the bladder and rectum, sweating, pallor, and bp swings in addition to withdrawal response. This distressing mass reflex can sometimes be used to give paraplegic patients a degree of bladder and bowel control. Ref: Ganong&;s review of medical physiology;23rd edition; pg:250