LIFESCI 2 Chapter Notes - Chapter 41: Tectorial Membrane, Basilar Membrane, Cochlear Nerve
Document Summary
Sensory cells: sensory cells transduce physical or chemical stimuli into action potentials, receptor cells, modified neurons, also known as transduction cells. Mechanoreceptors and sound: sound is the vibration of air molecules, waves of vibrations can have. Pinna is the funnel of the ear that we see. Auditory canal: sound travels through it to the middle ear. Tympanic membrane: commonly known as the eardrum, vibrations vibrate the tympanic membrane. Stapes: connects to cochleae, all three bones amplify sound. Cochlea: hearing apparatus, made of different chambers. Interpret vibrations that connect to axons and auditory nerve. Act like cells but behave like neurons. Tallest cilium is called kinocilium: reference point. Sit on basilar membrane with stereocilia on tectorial membrane. Stapes touches oval window where the cochlea which has perilymph. Perilymph starts to move, causing the basilar membrane to start moving: basilar membrane is more fluid, tectorial membrane is stiff.
