Any stimulus is a form of energy, so when some energy applied in the form of stimuli, this causes change in membrane potentials of neurons innervating that region, and causes depolarisation, which results in impulse generation and transmission.
Depend upon the severity of stimuli, the duration of impulse varies. These senses are received by sensory receptors. All the sensory pathways involves four basic functions namely, sensory reception and transduction, transmission, perception, amplification.
Thus, the blanks can be filled with sense.