Sensory input is the conduction of signals from sensory receptors.
Sensory receptors are structures that detect changes in the external and internal environment due to stimuli. They detect stimuli such as light, heat, pressure, and chemicals. Integration is the responsibility of the central nervous system, brain and spinal cord. Motor output is the conduction of signals from the processing center to effector cell that carry out the body's response. Nerves that conduct in this way are grouped together in the peripheral nervous system.