The third stage of stress is exhaustion and the body can no longer keep up with the demands placed on it.
Um...because someone put to much caffeine XD or a human does not need a lot of caffeine and coffee has more than needed
Metabolism can be defined as the chemical processes that occur within a living organism in order to maintain life. The two types of metabolic reactions are catabolic and anabolic. I think it’s the Thyroid that regulates metabolism. Lastly, metabolism is the process of converting food to energy therefore it effects energy.