What is a characteristic of efferent neurons?

• A. They transmit sensory information
• B. They induce muscle contraction
• C. They process reflex actions
• D. They relay information to the sensory organs

Answer: (B)

Efferent neurons are primarily responsible for transmitting signals from the central nervous system to effectors such as muscles and glands. This fundamental role means that one of their main functions is to induce muscle contraction. When the brain or spinal cord sends a signal through these neurons, it results in motor responses, which include movements and other actions carried out by muscles.

In contrast, the other options describe functions associated with different types of neurons. Sensory information is transmitted by afferent neurons, while reflex actions involve processing that occurs in the central nervous system typically involving both afferent and efferent pathways. Additionally, relaying information to sensory organs pertains to sensory neurons, not efferent neurons. Therefore, the role of inducing muscle contraction directly aligns with the defining characteristics of efferent neurons.