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Mechanoreceptors are specialized sensory receptors that respond to mechanical pressures or distortions. They play a crucial role in detecting light touch, as well as other tactile sensations such as pressure, vibration, and stretch. When light touch occurs, mechanoreceptors in the skin send signals to the brain, allowing us to perceive the sensation. They are sensitive to changes in pressure and can detect even the lightest touches, making them essential for our sense of touch.

In context, the other types of receptors serve different functions. Photoreceptors are responsible for detecting light and are found in the eyes, enabling vision. Thermoreceptors are sensitive to temperature changes, allowing us to perceive heat and cold. Nociceptors detect pain, responding to harmful stimuli that could cause injury or damage. Understanding the specific roles of each type of receptor clarifies why mechanoreceptors are integral for light touch detection.