Waking up is partly a result of the alarm clock but is primarily caused by the activation and detection of the somatic sensory system which is also responsible for the olfactory sensation produced by the brewing coffee. Consequently, actions that followed such as stretching and yawning are both classified under the somatic motor system wherein voluntary movement is controlled. To end, salivating falls under the autonomic parasympathetic motor while the rumbling of the stomach is classified under the enteric motor.