StimulusReceptor (or modulator)Control CentreEffectorResponseNegative feedback A change, either an increase or decrease in the level of an internal variable.(Sensory neuron)The structure that detects the change and sends signals to the effector(Motor neuron)The structure that adjusts its output to make the required correctionThe structure that evaluates the change and sends signals to the effectorThe corrective action taken (increase or decrease in variable)The counteracting effect of the response on the stimulus. hallo!hallo!A change, either an increase or decrease in the level of an internal variable.(Sensory neuron)The structure that detects the change and sends signals to the effector(Motor neuron)The structure that adjusts its output to make the required correctionThe structure that evaluates the change and sends signals to the effectorThe corrective action taken (increase or decrease in variable)The counteracting effect of the response on the stimulus.