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Which statement best describes the spinal cord and its role in the human nervous system?

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Solution

The spinal cord is a crucial part of the human nervous system. It is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It encloses the central canal of the spinal cord that contains cerebrospinal fluid.

The spinal cord functions primarily in the transmission of nerve signals from the motor cortex to the body, and from the afferent fibers of the sensory neurons to the sensory cortex. It is also a center for coordinating many reflexes and contains reflex arcs that can independently control reflexes. It is also the location of groups of spinal interneurons that make up the neural circuits responsible for rhythmic coordination of motor activities, such as walking.

Therefore, the statement that best describes the spinal cord and its role in the human nervous system is: "The spinal cord is a key conduit for transmitting signals between the brain and the rest of the body, and it also controls numerous reflexes."

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