The illustration above depicts a neuromuscular junction of a patient with an autoimmune disorder. Acetylcholine is a stimulatory neurotransmitter. Which of the following would be the most likely result of the continued presence of the antibody?

Acetylcholine is a neurotransmitter that moves towards the receptors shown in the picture. The antibodies seem to attach to the receptors and prevent acetylcholine from binding. This likely decreases communication from the motor neuron to the muscle fiber, resulting in muscle problems.