<prompt> Section of the vagus nerve results inIncreased rate of respirationDecreased depth of respirationIrregular breathing patternsIncreases in breath - holding time  <response>: Vagus nerve causes contraction of bronchial muscle helping in expiration. Section of vagus nerve leads to difficulty in expiration and therefore increasing breath holding time. Ref: Ganong;s review of medical physiology; 23rd edition; pg: 267; table 17-1. 