What is the main function of nervous tissue?

• A. Communication, conduct impulses
• B. Movement
• C. Digestion
• D. Support and structure

Answer: (B)

Nervous tissue is specialized for communication and rapid signaling. Its cells, mainly neurons, generate and conduct electrical impulses that carry information between sensory receptors, the brain, spinal cord, and effectors like muscles and glands. This fast communication allows the body to sense changes, process information, make decisions, and coordinate responses, from reflex withdrawals to complex thoughts and organ regulation.

Movement itself is produced when signaling reaches muscles and triggers contraction, so nervous tissue enables movement rather than being the tissue that performs the movement. For example, sensing heat sends a signal through nerves to the spinal cord, where it’s processed and an impulse is sent to muscles to pull the hand away. The other functions—digestion and structural support—are carried out by different tissues, such as epithelial and digestive tissues for processing nutrients, and connective or skeletal tissues for support.