What type of neurons transmit impulses away from the central nervous system (CNS)?

What type of neurons transmit impulses away from the central nervous system (CNS)?

• A. Motor (efferent) neurons
• B. Interneurons
• C. Sensory (afferent) neurons
• D. Neuroglia

Answer: (A)

Motor neurons, also known as efferent neurons, are responsible for transmitting impulses away from the central nervous system (CNS) to muscles and glands. They play a crucial role in initiating and controlling bodily movements by signaling the effectors, which carry out the responses to stimuli. These neurons are vital in the voluntary and involuntary control of actions, from moving limbs to regulating heart rate.

Interneurons serve as connectors within the CNS, facilitating communication between sensory and motor neurons. They mainly function in processing information locally within the brain and spinal cord but do not send impulses away from the CNS.

Sensory neurons, or afferent neurons, carry sensory information from the peripheral nervous system to the CNS, allowing the brain to process external stimuli. Their role is to bring data from the environment into the CNS rather than relaying commands outward.

Neuroglia, or glial cells, support, protect, and maintain the health of neurons but do not transmit impulses themselves. They play supporting roles like forming myelin, providing structural support, and participating in immune responses in the nervous system.

Understanding the roles of these different types of neurons clarifies why motor neurons are specifically designated to transmit impulses away from the CNS, distinguishing their function as pivotal in the