(See How Catalytic Converters Work for more details.). Controlling the engine is the most processor-intensive job on your car, and the engine control unit (ECU) is the most powerful computer on most cars.
â¢ Accidental poisoning is one of the leading causes of GI ulcer disease. This can be from plants (for example, toxic mushrooms, castor beans, or sago palm), pesticide or rodenticide toxicity, chemical poisoning (often with ethylene glycol or phenol), or heavy metal poisoning involving zinc, iron, or arsenic.
A rare cause of peptic ulcers is Zollinger-Ellison syndrome. In this condition, the stomach makes too much acid, damaging the stomach lining. Although there is no evidence to prove that emotional or mental stress causes ulcers, it does seem to make ulcers worse in some people. But the connection is still controversial.