Phoenix International Airport Terminal Information. Phoenix Sky Harbor International Airport has three passenger terminal buildings: Terminal 2, Terminal 3, and Terminal 4, the largest.
Heart rate and blood pressure are influenced by this nerve. As part of the parasympathetic nervous system, its effects are to lower both heart rate and blood pressure. In the lungs, the vagus nerve acts to constrict bronchi by causing the smooth muscles to tighten.
The vagus nerve is the key instrument of the parasympathetic system. Beginning in the medulla oblongata, the nerve travels to all of the organs of the body sending signals to and from the brain. The two previous posts provide lots of information about the vagus nerve and how to activate the relaxation response.