54-y/o woman comes for the office examination. She has been experiencing periods of heat intolerance, which she attributes to menopause. Physical examination - you note she has protuberant eyeballs, s tachycardia. Laboratory studies show a serum T3 of 5.3 nmol/L and a T4 of 225 nmol/L. Which hypersensitivities reaction is the most likely mechanism of pathogenesis?

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A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.