The conversion of a stimulus into an action potential by a receptor cell exists named transduction.
Transduction in the nervous system generally directs to stimulus-alerting events wherein a physical stimulus exists transformed into an action potential, which exists sent along axons towards the central nervous system for integration. It exists as a stage in the more extensive method of sensorial processing.
The first stage in the function of sensation exists in the stimulation of the sensory receptor by an appropriate stimulus. This exists observed by the transduction of the stimulus in which the sensory receptor transforms the energy in the stimulus into a graded potential. The amplitude of graded potentials changes with the strength of the stimulus. When the strength of the stimulus exists enough, an action potential exists fired.
For instance, odorant molecules in the air stimulate olfactory receptors in the nose, which transduce the chemical energy of the molecules into electrical energy.
Therefore, the correct answer is option C) transduction.
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