Final answer:
The electrical signals travel from sense receptors through the spinal cord to the brain and back to the muscles, resulting in the dog lifting its foot in response to pain.
Explanation:
The electrical signals take the following pathway:
- Sense receptors: Sense receptors in the foot detect the painful stimulus when the dog steps on a sharp rock.
- Spinal cord: The electrical signals from the sense receptors travel to the spinal cord.
- Brain: From the spinal cord, the signals are sent to the brain where they are interpreted as pain.
- Muscles: The brain produces signals that are carried back via neurons to the muscles, causing the dog to lift its foot in response to the pain.
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