What are examples of special receptors?

• A. Mechanoreceptors and nociceptors
• B. Photoreceptors and chemoreceptors
• C. Thermoreceptors and mechanoreceptors
• D. Interoceptors

Answer: (B)

Special receptors are tied to the body's specialized senses—vision, taste, and smell—often located in dedicated sense organs. Photoreceptors are the cells in the retina that detect light and initiate vision, while chemoreceptors respond to chemical substances, supporting taste and smell. This combination exemplifies the kinds of receptors geared toward distinct sensory modalities.

The other groups include receptors that are spread throughout the body for general sensing: mechanoreceptors respond to mechanical forces like touch and pressure, thermoreceptors to temperature, nociceptors to pain, and interoceptors monitor internal conditions. These are not the specialized sense receptors used for vision or chemical sensing, which is why photoreceptors and chemoreceptors are the correct pair.