Which of the following is true of the process of sensory transduction?
A) Receptors show action potentials to external stimuli.
B) The intensity of an external stimulus is related to the firing rate of the receptor.
C) An external stimulus is converted into changes in receptor membrane potential.
D) Most receptors show an action potential when stimulated with an external stimulus.
E) Transduction refers to the speed at which a sensory message travels toward the brain.

Question

Quizplus · Accepted Answer

Sensory transduction refers to the conversion of external stimuli into changes in receptor membrane potential. Receptors then generate graded potentials, not necessarily action potentials, and the intensity of the stimulus is coded by the magnitude of the graded potential. Therefore, choice C is the correct statement. Choices A and D are incorrect because not all receptors generate action potentials. Choice B is partially correct, but intensity is not directly related to firing rate in all cases. Choice E refers to the concept of neural conduction velocity, rather than sensory transduction.

Which of the Following Is True of the Process of Sensory