The Muscle Weakness of Myasthenia Gravis Results from

question 121

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 shock the muscle fibers.
• D)excessive acetylcholinesterase that destroys the neurotransmitter.
• E)All of the answers probably contribute to the muscle weakness.

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