سؤال قراءة ستيب محلول — فهم التفاصيل (تدريب 6502)

(1) Within the inner ear, thousands of hair cells detect sound waves and translate them into nerve signals that allow us to hear speech, music, and other everyday sounds. Damage to these cells is one of the leading causes of hearing loss, which affects 48 million Americans. (2) Each of us is born with about 15,000 hair cells per ear. And once damaged. These cells cannot regrow. However. Researches at MIT. Brigham and Women’s Hospital. And Massachusetts Eye and Ear have now discovered a combination of drugs that expands the population of progenitor cells also called supporting cells) in the ear and encourages them to become hair cells, offering a potential new way to treat hearing loss. (3) Because this treatment involves a simple drug exposure, the researchers believe it could be easy to administer it to human patients. They envision that the drugs could be injected into the middle ear. From which they would diffuse across a membrane into the inner ear. This type of injection is commonly performed to treat ear infections. (4) Hearing loss is a real problem as people get older. It’s very much of an unmet need, and this is an entirely new approach. What is the author’s main purpose?