What is the difference between a sensory neuron and a motor neuron

What is the difference between a sensory neuron and a motor neuron

• A. They both carry impulses to the brain
• B. Sensory neurons carry impulses from receptors to the CNS; Motor neurons carry impulses from CNS to effectors
• C. Sensory neurons carry impulses from effectors to the CNS
• D. Motor neurons carry impulses from the brain to muscles

Answer: (B)

The main idea is the direction of nerve impulses and the roles in sensing versus action. A sensory neuron starts at a receptor and sends an impulse from that receptor to the central nervous system, while a motor neuron starts in the CNS and sends an impulse from the CNS to an effector such as a muscle or gland, producing a response. That matches the statement that sensory neurons carry impulses from receptors to the CNS and motor neurons carry impulses from the CNS to effectors, which is why it’s the best answer. The other options mix up directions or places: impulses to the brain aren’t shared by both types, sensory neurons don’t carry impulses from effectors to the CNS, and motor impulses aren’t limited to the brain since they can travel from the spinal cord to muscles as well.

The main idea is the direction of nerve impulses and the roles in sensing versus action. A sensory neuron starts at a receptor and sends an impulse from that receptor to the central nervous system, while a motor neuron starts in the CNS and sends an impulse from the CNS to an effector such as a muscle or gland, producing a response. That matches the statement that sensory neurons carry impulses from receptors to the CNS and motor neurons carry impulses from the CNS to effectors, which is why it’s the best answer. The other options mix up directions or places: impulses to the brain aren’t shared by both types, sensory neurons don’t carry impulses from effectors to the CNS, and motor impulses aren’t limited to the brain since they can travel from the spinal cord to muscles as well.