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ACT Question for November 15th



The sensory cortex is a strip of the brain that receives and processes the signals sent by sensory nerves throughout the body.  For instance, if we touch a hot object with a fingertip, the sensation of heat is transmitted to an area approximately in the middle of the sensory cortex, as shown in Figure 1.  Figure 1 also shows that large portions of the brain may be devoted to processing the signals from small areas of the body such as the fingers and lips.

A biologist wishes to define a new variable "Q," equal to the percentage of the cerebral cortex devoted to a body part divided by the percentage of the body consisting of that body part. Based on the data in Figure 1, would one be justified in concluding that the Q for the lips is greater than 1?

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Question ID: 5910