Sensory receptors are usually found in sense organs such as the skin, ear and eye. They are called transducers as they convert internal and external stimuli of various kinds into an electrical impulse called a generator potential.All sensory receptors are specific to only one type of stimulus. The four main types are:
- mechanoreceptors which respond to mechanical stress and mechanical pressure.
- chemoreceptors which respond to chemicals.
- thermoreceptors which respond to heat.
- photoreceptors which respond to light e.g. rods and cones in the eye.