Which tissue is primarily responsible for transmitting electrical impulses throughout the body?

• A. Nervous tissue
• B. Epithelial tissue
• C. Connective tissue
• D. Muscle tissue

Answer: (A)

Electrical impulses are transmitted throughout the body by nervous tissue, whose specialized cells—neurons—are excitable and conductive. Neurons generate action potentials, propagate them along their axons, and transmit signals to other neurons or target cells at synapses, enabling rapid, long-distance communication for sensing, processing, and coordinating responses. Epithelial tissue forms protective barriers and lining surfaces, not long-distance signal transmission. Connective tissue provides support and structure, while muscle tissue responds to signals by contracting rather than carrying the signals themselves. So the nervous tissue is the primary system responsible for transmitting electrical impulses.