I Will Give A LIFESAVER, and I Need Help WithThis: \"I missed that. What did you
ID: 4453 • Letter: I
Question
I Will Give A LIFESAVER, and I Need Help WithThis:"I missed that. What did you say?"
According to the National Center for Health Statistics, one out of10 Americans has a hearing loss. There are three types of hearingloss: conductive, sensorineural, and mixed. In conductive hearingloss, problems in the outer or middle ear block the transmission ofvibrations to the inner ear. Conductive hearing loss can be theresult of any number of disorders. The most common disorders areear infections, excessive ear wax, fluid in the middle ear, andperforated eardrum. This type of hearing loss can usually betreated by medical or surgical procedures.
Sensorineural hearing loss, or "nerve deafness," is most often dueto the gradual aging process or long-term exposure to loud noise.However, it can also be caused by high fever, birth defects, andcertain drugs.
Some people with impaired hearing have both conductive andsensorineural hearing loss, which is known as mixed hearing loss.Most people with this condition can be helped by either a hearingaid or surgery.
Depending on the symptoms, certain tests can be done to determinethe cause and extent of the hearing loss. A stand hearingevaluation may include the following:
-- tympanometry, which examines the middle ear, eardrum, andpossible blockage of the ear canal
-- pure-tone and speed reception testing, which determines thesoftest level or threshold at which tones and speech are heard
-- word discrimination testing, which measures the ability todistinguish words at a comfortable volume
In a recent interview, a rock band saxophone player admitted thatover a 6-year period, he developed a 40 percent hearing lossbecause he neglected to use ear protection during his concertperformances. Likewise, the use of personal listening devices, suchas head-phones, may also cause hearing loss. Your ability to hearis not renewable. It pays to protect your ears from loudnoises.
According to the reading passage, prolonged body temperature of105°F may result in:
1. an inner-ear infection
2. conductive hearing loss
3. sensorineural hearing loss
4. a perforated eardrum
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A medical test indicates that a patient has adefective protein. This condition is most likely due to a change inthe directions coded in the:
1. number of hydrogen atoms in starch molecules
2. sequence of inorganic molecules
3. number of carbon atoms in sugar molecules
4. sequence of subunits in DNA
Explanation / Answer
Sensorineural hearing loss, or "nerve deafness,"is most often due to the gradual aging process or long-termexposure to loud noise. However, it can also be caused byhigh fever, birth defects, and certain drugs. 3. Sensorineural hearing loss ******************************************************************************************* The central dogma states that DNA codes for RNA which then codesfor proteins 4. sequence of subunits in DNA
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