Which describes connector neurons?

Which describes connector neurons?

• A. Neurons that transmit impulses from the brain to muscles
• B. Neurons in the spine that receive incoming sensory nerve impulses and relay them to the appropriate motor nerves and endocrine glands
• C. Sensory neurons
• D. Interneurons

Answer: (B)

Connector neurons are interneurons. They reside in the central nervous system (the brain and spinal cord) and their job is to link sensory information to motor output. After a sense organ detects something, an interneuron processes that signal and passes it on to a motor neuron, which then triggers a response in muscles or glands. This bridging role lets reflexes happen quickly and enables more complex processing in the brain. Sensory neurons carry signals toward the CNS, and motor neurons carry signals away from the CNS to muscles or glands, so interneurons sit in between to connect the two. Endocrine glands aren’t typically directly controlled by a single interneuron; signals to glands come through autonomic pathways or hormonal signals, not straight from an interneuron to a gland. This makes interneurons the best description of connector neurons.

Connector neurons are interneurons. They reside in the central nervous system (the brain and spinal cord) and their job is to link sensory information to motor output. After a sense organ detects something, an interneuron processes that signal and passes it on to a motor neuron, which then triggers a response in muscles or glands. This bridging role lets reflexes happen quickly and enables more complex processing in the brain. Sensory neurons carry signals toward the CNS, and motor neurons carry signals away from the CNS to muscles or glands, so interneurons sit in between to connect the two. Endocrine glands aren’t typically directly controlled by a single interneuron; signals to glands come through autonomic pathways or hormonal signals, not straight from an interneuron to a gland. This makes interneurons the best description of connector neurons.