Your friend has a paralyzed arm. What physical events might have caused this?
A) damage to the part of the brain that controls that arm
B) drug-induced failure at the neuromuscular junction
C) damage to the part of the spinal cord that controls that arm
D) Any of these events could have caused the paralysis: damage to the part of the brain that controls that arm, damage to the part of the spinal cord that controls that arm, or drug-induced failure at the neuromuscular junction.
Answer: D
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