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144761 Medicine

A 67-year-old man with lung cancer notices symptoms of weakness in his arms and legs. He describes difficulty in rising out of chair or going upstairs, but no pain or discomfort. On examination, proximal muscle strength is four out of five in the upper and lower limbs, but the reflexes, tone, and sensation are normal. He has a colored rash on his eyelids, and raised papules on his knuckles.For the above patient with muscle weakness, select the most likely anatomic site for the disorder

Aanterior horn cell
Bperipheral nerve
Cneuromuscular junction
Dmuscle
Medicine
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144764 Anaesthesia

D-tubocurarine acts by

AInhibiting nicotinic receptors at myoneural junction
BInhibiting nicotinic receptors at autonomic ganglion
CProducing depolarizing block
DBy inhibiting reuptake of acetylcholine
Anaesthesia
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