SPLH 620 Exam 2| QUESTIONS AND ANSWERS 100% ACCURATE(SCORED A+)

What nerve is is involved in hearing and balance? - ANSWER-CN VIII (Vestibulocochlear!) What does vestibular mean? - ANSWER-Position and movement of head What is the brief anatomy of the ear (hearing & balance system)? - ANSWER-1. Outer Ear (pinna, ear canal) 2. Middle Ear (tympanic membrance, ossicles (malleus, incus, stapes)) 3. Inner Ear (Cochlea, Vestibular System) What are the parts of the Middle Ear? What is the inner ear filled with? - ANSWER-1. Tympanic Membrane 2. AIR FILLED! 3. Ossicles (malleus, incus, stapes) 4. Oval Window Inner ear: FLUID filled! What are the functions of the Middle and Inner Ear? - ANSWER-M: Amplification of signal, transforms signal (acoustic to mechanical) I: Transforms signal (mechanical to chemoelectric), represent sound frequencies What are the layers in the Cochlea? - ANSWER-Top: Scala Vestibuli (perilymph fluid) Middle: Cochlear Duct (endolymph fluid) Bottom: Scala Tympani (perilymph fluid) How many times is the Cochlea coiled? - ANSWER-2.5 turns Where is the Organ of Corti located and what is it? - ANSWER-Located in the Scala Media It's a sensory organ for the hearing system, it's composed of hair cells Where does the Organ of Corti rest? - ANSWER-It rests on the basilar membrane. It's composed of hair cells. Inner Hair cells (3500), Outer Hair cells (15000).