Want this question answered?
brain stem
it not a gas it your brain
the brain
medulla
the brain stem is what controlls the heart rate, respiration and such.
The brain stem controls these functions
The brain stem manages the basic functions of the body - respiratory rate, metabolic rate, maintaining homeostasis, fight or flight response, etc.
The Brain, specifically the brain stem and the central nervous system that controls any "unconscious" activities like breathing and pulse rate.
medulla
Your Heart Rate increases in order to supply additional Oxygen to your muscles, primarily as part of the Fight/Flight response, or in response to vigorous exercise. Increased demand for Oxygen, triggers the Adrenal Glands to secrete Adrenaline into the bloodstream. This in turn, acts on the Medulla, at the base of the Brain, which controls the Heart Rate and Breathing (plus a few other things) via the Vagus Nerve.
There are three vital centers in the medulla which control the heartbeat, the rate of breathing, and the diameter of the blood vessels.
Carbon Dioxide