What function does the sensory neuron serve in a reflex arc?

The sensory neuron plays a crucial role in a reflex arc by transmitting signals to the interneuron. When a sensory neuron, which is responsible for detecting stimuli from the environment (such as heat, pain, or pressure), is activated, it generates an electrical impulse. This impulse travels along the sensory neuron to the spinal cord, where it connects with interneurons. Interneurons then process the information and relay signals to motor neurons, which ultimately activate the effectors, such as muscles or glands, to produce a response. This direct pathway allows for rapid reflex actions to occur, often without the need for conscious thought, thereby enabling organisms to respond quickly to potential threats or stimuli.