How does the brain and the nervous system assist in times of limited body resources?

The brain is considered as the main center of the human body. The nervous system is the system of the body that coordinates in all of the functions of the other systems. They serve as the main communication system or as the coordinator of the systems of the body. So for example if one system fails to do its function, this sends signals to the brain, then the brain sends messages to other systems to compensate of the loss. Hope this answers your question.