Activation of the sympathetic nervous system question 13 options: a. increases respiration and decreases salivation. b. increases respiration and increases salivation. c. decreases respiration and increases salivation. d. decreases respiration and decreases salivation. save

The correct option is A.
The sympathetic nervous system is the part of autonomic nervous system which activate the fight or flight response system. The sympathetic nervous system can accelerate the heart rate, widen the bronchial passage, decrease motility of the intestines and constricts the blood vessels.

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Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.