Mechanoreceptors are sensory receptors that process pressure and touch information. They are specialized to detect mechanical stimuli such as pressure, vibration, and stretching. These receptors are found in the skin, muscles, and other tissues throughout the body, allowing us to perceive sensations of touch, pressure, and texture. Chemoreceptors, olfactory receptors, and photoreceptors, on the other hand, are responsible for detecting chemical, smell, and light stimuli respectively, making them unrelated to the processing of pressure and touch information.