Question

Simple two-neuron reflex consists of

• A. Sensory neuron
• B. Effector neuron
• C. Both A and B
• D. Sensory neuron, effector neuron and spinal cord

Answer 1

Answer: (D)

Sensory neuron, effector neuron and spinal cord

D. Sensory neuron, effector neuron, and spinal cord

Reason: Reflex arc transmits the sensory information from receptor to effector via the spinal cord. It consists of the sensory receptor, afferent neuron, spinal cord, efferent neuron, and effector organ. The afferent/sensory neurons transmit the sensory information from sensory receptors to the spinal cord. The interneurons of the spinal cord integrate the incoming information and the signal is relayed to motor/efferent neurons.