Final answer:
The semicircular canals are three fluid-filled tubes that detect changes in angular acceleration and deceleration. Option b is correct..
Step-by-step explanation:
The semicircular canals are three fluid-filled tubes in the inner ear that detect changes in angular acceleration and deceleration. They are part of the vestibular system, which is responsible for our sense of balance and spatial orientation. The semicircular canals contain hair cells that detect movement of fluid caused by head rotation, allowing the brain to perceive changes in our position and movement in three dimensions. The other options listed (Cochlea, Vestibule, and Tympanic membrane) are not directly involved in detecting angular acceleration.
Each semicircular canal is oriented at a different angle, allowing for the detection of rotational movement along different planes. The base of each canal has an enlargement called the ampulla, which contains hair cells with stereocilia protruding into a gelatinous structure called the cupula. As angular acceleration occurs, such as when turning a corner or spinning, the fluid within the canals moves, causing the cupula to displace and the stereocilia to bend. This action generates nerve impulses that are sent to the brain, informing it of the body's motion and orientation in space.