Final answer:
The three functions of an alarm system involve sensation, notification, and control, which mirror the basic functions of the nervous system that include sensation, integration, and response. Additionally, control can be classified as somatic or autonomic, with a specific subset known as the enteric nervous system dedicated to gastrointestinal functions.
Step-by-step explanation:
The three functions of an alarm system are sensation, notification, and control. The nervous system can be categorized functionally in two ways. First, its basic functions include sensation, which is the detection of external or internal stimuli; integration, which is the processing and interpretation of sensory information; and response, which is the reaction to the integrated stimuli. The second categorization deals with how the body is controlled, distinguishing between somatic control, which governs voluntary movements and reflex arcs, and autonomic control, which manages involuntary functions such as heart rate and digestion. Within autonomic control, there's a specialized part called the enteric nervous system that focuses on the gastrointestinal functions.