The Muscle Weakness of Myasthenia Gravis Results from

question 38

Multiple Choice

The muscle weakness of myasthenia gravis results from

• A)insufficient acetylcholine release from presynaptic vesicles.
• B)loss of acetylcholine receptors in the end-plate membrane.
• C)the motor neuron action potential being too small to stimulate the muscle fibers.
• D)excessive acetylcholinesterase that destroys the neurotransmitter.
• E)inability of the muscle fiber to produce ATP.

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