Question

now, if you stub your toe, the signal travels in the other direction. the nerves in your toe detect a sharp pain. then those nerves send a signal that moves up to the brain. when the signal arrives less than a second later, you might yell, \ow!\
what is the gist of the part of the passage in the box?
signals in the nervous system work better when humans listen carefully to them.
the brain controls how loudly people shout when they are hurt.
signals in the nervous system help the brain communicate with the rest of the body.
the brain always lets the body know when it has been injured.

Explanation:

The passage describes that when the toe is stubbed, nerves detect pain and send a signal to the brain, resulting in a reaction like yelling "Ow!". This shows the nervous system's role in communication between the body (toe) and the brain. Option C aligns with this as it mentions the nervous system helping the brain communicate with the body. Option A about listening carefully is not in the text. Option B about brain controlling shout loudness is not the main point. Option D's "always" is an over - generalization not supported by the single example.

Answer:

C. Signals in the nervous system help the brain communicate with the rest of the body.