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31. A 43-year-old man has had progressive hearing loss since he began to work in a factory that makes jet engines 10 years ago. Sound does not lateralize to either ear ic the Weber test, and air conduction is greater than bone conduction in the Rinne test. Audiography shows a 40-d8 increase in hearing threshold for high-frequency sounds. Which of the following is the most likely cause of the hearing loss? A) Cell loss in the dorsal and ventral cochlear nuclei B) Damage to the basilar membrane near the apex of both cochleas C) Disruption of the ossicular chains in both ears D) Loss of hair cells near the base of both cochleas E) Scarring of both tympanic membranes

31. A 43-year-old man has had progressive hearing loss since he began to work in a factory that makes jet engines 10 years ago. Sound does not lateralize to either ear ic the Weber test, and air conduction is greater than bone conduction in the Rinne test. Audiography shows a 40-d8 increase in hearing threshold for high-frequency sounds. Which of the following is the most likely cause of the hearing loss? A) Cell loss in the dorsal and ventral cochlear nuclei B) Damage to the basilar membrane near the apex of both cochleas C) Disruption of the ossicular chains in both ears D) Loss of hair cells near the base of both cochleas E) Scarring of both tympanic membranes

Phlebotomy Essentials
Phlebotomy Essentials
6th Edition
ISBN:9781451194524
Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)
Chapter1: Phlebotomy: Past And Present And The Healthcare Setting
Section: Chapter Questions
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31. A 43-year-old man has had progressive hearing loss since he began to work in a factory that makes jet engines 10 years ago. Sound does not lateralize to either ear in the Weber test, and air conduction is greater than bone conduction in the Rinne test. Audiography shows a 40-d8 increase in hearing threshold for high-frequency sounds. Which of the following is the most likely cause of the hearing loss? A) Cell loss in the dorsal and ventral cochlear nuclei B) Damage to the basilar membrane near the apex of both cochleas C) Disruption of the ossicular chains in both ears D) Loss of hair cells near the base of both cochleas E) Scarring of both tympanic membranes
Transcribed Image Text:31. A 43-year-old man has had progressive hearing loss since he began to work in a factory that makes jet engines 10 years ago. Sound does not lateralize to either ear in the Weber test, and air conduction is greater than bone conduction in the Rinne test. Audiography shows a 40-d8 increase in hearing threshold for high-frequency sounds. Which of the following is the most likely cause of the hearing loss? A) Cell loss in the dorsal and ventral cochlear nuclei B) Damage to the basilar membrane near the apex of both cochleas C) Disruption of the ossicular chains in both ears D) Loss of hair cells near the base of both cochleas E) Scarring of both tympanic membranes
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