LIFESCI 7C Chapter Notes - Chapter 36.3: Semicircular Canals, Cochlear Duct, Statocyst
Document Summary
Hair cells: a specialized mechanoreceptor that senses movement and. Stereocilia: nonmotile cell-surface projections on hair cells whose movement vibration causes a depolarization of the cell"s membrane. Lateral line system: in fish and sharks, a sensory organ along both sides of the body that uses hair cells to detect movement of the surrounding water. Statocysts: a type of gravity-sensing organ found in most invertebrates. Statolith: in plants, a large starch-filled organelle in the root cap that senses gravity; in animals, a dense particle that moves freely within a statocyst, enabling it to sense gravity. Vestibular system: a system in the mammalian inner ear made up of twstero statocyst chambers and three semicircular canals. Semicircular canal: one of three connected fluid-filled tubes in the mammalian inner ear that contains hair cells that sense angular motions of the head in three perpendicular planes. Hair cells detect the physical vibrations of sound.
