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The spinal cord can process certain sensory inputs and trigger immediate motor responses without consulting the brain. This process, known as a reflex, involves a signal traveling from a sensory nerve to a processing center within the spinal cord, which then issues a direct command to a motor nerve. This rapid pathway is a crucial survival mechanism, as it saves critical time by bypassing the brain, allowing the body to react almost instantaneously to potentially harmful stimuli.

Spinal Cord Reflexes

Common examples of automatic reflexes initiated by the spinal cord include the knee-jerk reflex and the rapid withdrawal of a hand from a hot object. These actions demonstrate the spinal cord's ability to react to stimuli for protective purposes without waiting for commands from the brain.

Examples of Spinal Reflexes

A person accidentally touches a hot pan and immediately pulls their hand away. Which of the following statements best analyzes the sequence of events in the nervous system that produces this rapid withdrawal?

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