The nervous system generally is best described as which?

• A. Stores nutrients
• B. Controls body function
• C. Regulates respiration only
• D. Filters toxins

Answer: (B)

The nervous system’s job is to control and coordinate body function through rapid signaling between the brain, spinal cord, and nerves. It collects sensory information, processes it, and produces appropriate motor or autonomic responses, enabling movement, perception, thought, and the regulation of internal conditions like heart rate and digestion. That makes it the main system responsible for directing how the body behaves as a whole.

Storing nutrients isn’t a function of the nervous system—it’s handled by digestive organs, liver, and fat tissue. Regulating respiration is one important role, but the nervous system does this among many other tasks rather than only governing breathing. Filtering toxins isn’t a nervous system job either; detoxification and toxin elimination involve organs like the liver and kidneys.