During the Development of Specialized Postsynaptic Structures at a Neuromuscular

question 4

Multiple Choice

During the development of specialized postsynaptic structures at a neuromuscular junction,preexisting AChR proteins on the surface of the uninnervated muscle are induced to aggregate by:

• A)agrin,a signal released from the neuron.
• B)the muscle membrane protein,MuSK.
• C)the cytosolic protein,rapsyn.
• D)all of the above

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