Final answer:
A mechanically gated channel opens due to physical distortion of the cell membrane, converting physical stimuli such as pressure or sound into electrical signals for sensory perception.
Step-by-step explanation:
A mechanically gated channel opens in response to physical distortion of the cell membrane. This type of ion channel is often involved in sensory processes, such as touch, where pressure applied to the skin may cause these channels to open, allowing ions to flow into the cell. The process is key to converting mechanical stimuli into an electrical signal, which is essential for sensory perception. Mechanically gated channels are also found in structures like stereocilia in the human ear, where they play a role in converting mechanical sound vibrations into nerve signals that the brain can interpret as sound.