Answer:
If someone is having a hard time hearing certain tones, the most likely problem is with the mechanoreceptors in the ear. The ear has different types of mechanoreceptors that are responsible for detecting sound waves of different frequencies. If these receptors are damaged or not functioning properly, it can result in difficulty hearing certain tones. Chemoreceptors on the tongue are responsible for detecting taste, photoreceptors in the eye are responsible for detecting light, and mechanoreceptors on the hand are responsible for detecting touch and pressure.