Which system is responsible for sending and receiving nerve impulses?

• A. Nervous System
• B. Endocrine System
• C. Circulatory System
• D. Lymphatic System

Answer: (A)

Receiving and sending nerve impulses is the function of the nervous system. It acts as the body's communication network, with neurons carrying electrical signals from sensory receptors to the brain and spinal cord, and from there back out to muscles and glands to produce actions. This rapid signaling underpins senses, reflexes, and coordinated movement. The endocrine system uses hormones in the bloodstream to regulate processes, which is slower and not about direct impulse transmission. The circulatory system transports blood, nutrients, and wastes but does not convey nerve signals. The lymphatic system protects against disease and helps fluid balance, not nerve signaling. So the nervous system is the system responsible for sending and receiving nerve impulses.