The autonomic nervous system, also known as the involuntary nervous system, regulates those facets in the body that occur automatically, such as breathing, blood pressure, digestion, heart beat, bladder function and narrowing or widening of the blood vessels.
Is the dry chemical in a fire extinguisher dangerous when inhaled?   The dry powder in ABC fire extinguishers is non-toxic but can cause skin irritation. You can check the manufacturer's website but this info is from the Kidde user guide â¦for their fire extinguishers and should be accurate.
1 Water extinguishers work by removing heat from the fire.  Dry chemical extinguishers are tanks of foam or dry powder with compressed nitrogen as the propellant. They work by smothering the fire: when you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it, and the fire goes out.