A tendon organ or neurotendinous organ or Golgi tendon organ is a mechanoreceptor located at the insertion point of the skeletal muscle to the tendon that is at the myotendinous junction.
The Golgi tendon organ is composed of the collagenous muscle fibres which contain the receptors which sense the contraction of active stretch of the muscles and sends it to the brain. The brain sends the response and the muscle act by the inverse myotatic reflex.
Anorexia nervosa is characterized by a strong desire to lose weight due to the fear of becoming thin.
Here the person is on a low caloric restriction diet, and the person often assumes that he/she is overweight even though the person is underweight.
In the given situation, Katie is skipping meals and throwing away food and constantly losing weight, all these are the characteristic symptoms of anorexia nervosa as described above.
