In a reflex arc, which component carries impulses from the integration center to the effector?

In a reflex arc, which component carries impulses from the integration center to the effector?

• A. Receptor
• B. Sensory neuron
• C. Integration center
• D. Motor neuron

Answer: (D)

In a reflex arc, information flows from receptor to sensory neuron to an integration center, where the signal is processed, and then a command is sent out to the effector. The component that carries that command from the integration center to the effector is the motor neuron. It transmits the signal from the CNS to the muscle or gland that responds, triggering contraction or secretion. The receptor and sensory neuron handle sensing and delivering the stimulus to the CNS, while the integration center processes the input; neither directly delivers the command to the effector.

In a reflex arc, information flows from receptor to sensory neuron to an integration center, where the signal is processed, and then a command is sent out to the effector. The component that carries that command from the integration center to the effector is the motor neuron. It transmits the signal from the CNS to the muscle or gland that responds, triggering contraction or secretion. The receptor and sensory neuron handle sensing and delivering the stimulus to the CNS, while the integration center processes the input; neither directly delivers the command to the effector.