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A researcher studying cats discovered that during the dream state of sleep, the cerebral cortex of a cat's brain fires messages to the cat's body as rapidly as it does during wakefulness. In a effort to determine why the sleeping cat's body does not respond to the message being fired by the brain ,the resacher removed a cluster of neurons from a sleeping cat's brain stem,the part of the brain that connects the cerebral coretx to the spinal cord. After he had done so,the still sleep cat stood up,pounced as if it were chasing a mouse,and arched its back.
Which of the following , if true , taken together with the information above ,best supports the conclusion that the sleeping cat was acting out its dream?
A：The neurons that were removed from the brain stem normally serve to trigger the dream state of sleep and the rapid brain activity that accompanies it.
B: The cerebral corrtex is able to receieve and transmit sensory information even when the brain is in a sleepng state.
C: The neurons that were removed from the brain stem are normally responsible for transimitting messagr from the cerebral cortex.
D:The neurons that were removed from the brain stem normally prevent message fired by the cerebral cortex during sleep from being receieved by the spinal cord.
E: The types of brain waves produced by the cerebral corrtex during sleep have distinctly different properties from those produced during a wakeful state.
my answer is C? any one can confirm it? open to discuss | 
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发表于 2005-10-24 12:04:00
