The main controls to respiration are levels of C02 and to a much lesser extent oxygen. Since C02 levels reflect both acid-base balance as well as levels of metabolic activity there are two...
many but the most effective one is when you get attacked by the resitiousfulick which can kill you if not treated in the next 10 secounds. this can be caused by playling too many video games (example...
Hypothyroidism, heart blockage, electrolyte imbalance in your body because your sodium and potassium are crashing, extreme malnutrition, and hypothermia.