The meaning of sensory receptor and the range of structures encompassed by the term
To determine:
The meaning of the term sensory receptor and the different structures encompassed by this term
Introduction:
There are several types of receptors, such as chemoreceptors, mechanoreceptors, and photoreceptors. The receptors that produce responses against the chemical stimulus are termed as chemoreceptors. The receptors that produce responses against light-related stimuli are termed as photoreceptors.
Explanation of Solution
A sensory receptor refers to the structure that is specialized in detecting a particular stimulus. The receptors may include simple nerve endings called the dendrites. The receptors may also include the nerve ending that combines with connective, muscular, or epithelial tissues, and such receptors are known as sense organs. The sense organs play an important role in enhancing the response to a particular stimulus.
The receptors that can be classified on the basis of the modality are thermoreceptors, photoreceptors, chemoreceptors, nociceptors, and mechanoreceptors. The receptors can also be classified on the basis of the distribution of receptors, and these are general senses and special senses. The types of receptors based on the origins of stimuli are exteroceptors, interoceptors, and proprioceptors.
Thus, sensory receptors can be defined as the structure specialized to recognize a specific stimulus. The receptors may include dendrites or sense organs. The types of receptors are photoreceptors, chemoreceptors, nociceptors, thermoreceptors, and mechanoreceptors based on the modality.
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