Which type of nerves transmit messages from the brain and spinal cord to muscles and glands?

• A. Afferent (sensory) nerves
• B. Efferent (motor) nerves
• C. Central nerves
• D. Peripheral nerves

Answer: (B)

Efferent (motor) nerves are responsible for transmitting messages from the brain and spinal cord to the muscles and glands. These nerves are essential in facilitating movement and physiological responses by carrying signals that instruct muscles to contract or glands to secrete hormones and other substances. This function plays a critical role in the central nervous system's ability to control bodily functions and respond to stimuli.

In contrast, afferent (sensory) nerves carry signals from sensory receptors to the central nervous system, which allows for perception of stimuli. Central nerves typically refer to the nerves within the brain and spinal cord, while peripheral nerves encompass both afferent and efferent nerves that extend throughout the body. Understanding the distinction between these types of nerves is crucial for grasping how the nervous system communicates and coordinates bodily functions.