Damaged nerves in the spinal cord do not regenerate themselves naturally, nor even under the spur of nerve-growth stimulants. The reason, recently discovered, is the presence of nerve-growth inhibitors in the spinal cord. Antibodies that deactivate those inhibitors have now been developed. Clearly, then, nerve repair will be a standard medical procedure in the foreseeable future.
Which of the following, if true, casts the most serious doubt on the accuracy of the prediction above?
(A) Prevention of the regeneration of damaged nerves is merely a by-product of the main function in the human body of the substances inhibiting nerve growth.
(B) Certain nerve-growth stimulants have similar chemical structures to those of the antibodies against nerve-growth inhibitors.
(C) Nerves in the brain are similar to nerves in the spinal cord in their inability to regenerate themselves naturally.
(D) Researchers have been able to stimulate the growth of nerves not located in the spinal cord by using only nerve-growth stimulants.
(E) Deactivating the substances inhibiting nerve growth for an extended period would require a steady supply of antibodies.
答案給A
題目是說受損的神經無法再生是因為在脊椎裡有種神經長成的抑制物 可以驅散這種抑制物的抗體已經在發展了 所以神經修復往後將成為標準醫療流程
A是說防止受損神經再生只是在人體中抑制神經長成物質的主要功能的附帶結果
看不出來有weaken呀 即便只是附帶結果 但是消除了這種結果 還是可以使神經再生不是嘛?
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