[求助]GWD29-40

ilovecushi

 GWD-29-Q40

Mice that have been given morphine are very likely to develop blood poisoning because bacteria that normally reside in the intestine typically respond to morphine by migrating into the bloodstream.  However, when mice are given both morphine and the new drug naltrexone, blood
        

poisoning is much less frequent, although it does still occur.  These results provide support for researchers’ prediction that naltrexone will turn out to be toxic to certain types of bacteria.

 

Which of the following, if discovered to be true, would most seriously weaken the support for the researchers’ prediction?

 

1. After being administered to mice, naltrexone does not pass from the bloodstream into the intestine.

2. Naltrexone inhibits morphine from triggering the migration of intestinal bacteria into the bloodstream.

3. Mice that have been given naltrexone but not morphine have no greater risk of developing blood poisoning than do mice that have not been given either substance.

4. The increased risk of blood poisoning is not the only harmful effect on mice of being given morphine.

5. Conditions other than the presence of intestinal bacteria in the bloodstream can cause blood poisoning in
                       mice.

不懂为何答桉不是C
给的答桉是E 但总觉得有点无关
请路过的同学帮帮忙~~~
不懂~

Junay

B吧

ilovecushi

以下是引用ilovecushi在2007-11-13 6:13:00的发言：

 GWD-29-Q40

Mice that have been given morphine are very likely to develop blood poisoning because bacteria that normally reside in the intestine typically respond to morphine by migrating into the bloodstream.  However, when mice are given both morphine and the new drug naltrexone, blood
  

poisoning is much less frequent, although it does still occur.  These results provide support for researchers’ prediction that naltrexone will turn out to be toxic to certain types of bacteria.

Which of the following, if discovered to be true, would most seriously weaken the support for the researchers’ prediction?

1. After being administered to mice, naltrexone does not pass from the bloodstream into the intestine.

2. Naltrexone inhibits morphine from triggering the migration of intestinal bacteria into the bloodstream.

3. Mice that have been given naltrexone but not morphine have no greater risk of developing blood poisoning than do mice that have not been given either substance.

4. The increased risk of blood poisoning is not the only harmful effect on mice of being given morphine.

5. Conditions other than the presence of intestinal bacteria in the bloodstream can cause blood poisoning in
        mice.

不懂为何答桉不是C
给的答桉是E 但总觉得有点无关
请路过的同学帮帮忙~~~
不懂~

不懂为何答桉不是C
给的答桉是E 但总觉得有点无关
请路过的同学帮帮忙~~~
不懂~

after reading another time, i think i understand the problem in a new way.

the focus is on the last sentence, that is, the naltrexone will work against certain type of bacteria, therefore, th function of naltrexone is protecting the body.

way to weak this result would be E. othr conditions such as some bacterias in other organs may affect the bloodstream. therefore, the naltrexone is not able to protect the bloodstream.

not sure whether think in this way is correct..