Which system maintains homeostasis and communicates through electrical impulses?

• A. Digestive System
• B. Nervous System
• C. Lymphatic System
• D. Respiratory System

Answer: (B)

Electrical signals traveling along neurons to coordinate body activities are how the nervous system keeps the body's conditions stable. Neurons generate action potentials, fast electrical impulses that travel to target cells and release neurotransmitters at synapses, enabling rapid responses everywhere—from adjusting heart rate and breathing to triggering reflexes and regulating digestion. This rapid, wireless-like communication naturally fits the idea of maintaining homeostasis through electrical signaling, which sets the nervous system apart from other systems. Digestive, lymphatic, and respiratory systems regulate conditions too, but they rely more on chemical signals, hormones, or mechanical processes rather than direct electrical communication.