<prompt> Myaesthenia gravis is associated with:Decreased acetylcholine at nerve endingsDecreased myosinAbsent troponin CDecreased myoneural junction transmission  <response>: Answer is D Decreased Myoneural junction transmission: The primary defect in Myaesthenia gravis is decreased transmission across the myoneural junction due to decrease in the number of Acetylcholine receptors. The fundamental defect is Myaesthenia gravis is a decrease in the number of Acetylcholine Receptors at the postsynaptic muscle membrane, which results in decreased efficiency of neuromuscular transmission -- Harrison 