Problem: A 39-year-old woman came to the office because of blurred vision for the past two months. The patient has also experienced difficulty chewing and swallowing. The symptoms worsen throughout the day and improve with rest. The patient works as a teacher and has had a great deal of stress lately. She does not smoke and drinks a glass of wine occasionally. She takes no medications. Temperature is 37.0°C (98.6°F), pulse is 68/min, respirations are 18/min, and blood pressure is 130/80 mmHg. Physical examination reveals bilateral ptosis. Muscle strength is decreased in both lower extremities. A lateral chest x-ray shows an anterior mediastinal mass. Electromyography shows a decremental response following repetitive nerve stimulation. Which of the following types of receptors is most likely involved in the pathogenesis of this patient's condition? Elimination tool Transmembrane receptor associated with tyrosine kinase activity Transmembrane receptor causing activation of Janus kinase/STAT pathway Ion channel-linked receptor Intracellular receptor with DNA-binding domain Membrane-bound G-protein coupled receptors. Need Assignment Help?