GWD-13-Q32 Macrophages 看得有点晕

oliverwangchao

Macrophages are cells that play a role in the response of the immune system of mice and other mammals to invasive organisms such as bacteria.Unlike other mice, mice that are genetically incapable of making these particular cells do not show elevated levels of nitrates硝酸盐 when infected with bacteria.

The statements above, if true, provide the most support for which of the following conclusions?

A.Mice that are unable either to make macrophages or to make them in sufficient numbers will protect themselves from bacterial infections in some other way.

B.Mice that show elevated levels of nitrates can easily fight off most types of bacterial infections.

C.In mice, macrophages play a role in the production of nitrates or inhibit a process by which nitrates are broken down or otherwise eliminated.

D.When a healthy mouse becomes infected with an invasive organism, the number of macrophages in the mouse’s body decreases.

E.Injections of nitrates into mice that lack macrophages will not enhance the ability of these animals’ immune systems to fight off infection.

The statements above, if true, provide the most support for which of the following conclusions?

A.Mice that are unable either to make macrophages or to make them in sufficient numbers will protect themselves from bacterial infections in some other way.

B.Mice that show elevated levels of nitrates can easily fight off most types of bacterial infections.

C.In mice, macrophages play a role in the production of nitrates or inhibit a process by which nitrates are broken down or otherwise eliminated.

D.When a healthy mouse becomes infected with an invasive organism, the number of macrophages in the mouse’s body decreases.

E.Injections of nitrates into mice that lack macrophages will not enhance the ability of these animals’ immune systems to fight off infection.

colasama

这题挺直白的啊...没有Macrophages的老鼠遇到病毒时，nitrates level不会上升。
----->Macrophages参与nitrates的生成，或者阻止nitrates被破坏。

反正Macrophages这东西对nitrates level有正面影响

bbfcsak

这题我选的B
我是这样理解的，根据题意，没有MAR会导致NIT没有明显提高进一步会导致老鼠无法抵抗病毒。
所以说MAR会提高NIT然后会抵抗病毒，所以B选项说的就是有NIT的可以抵抗病毒。
真心求教。

hanshipeng

C对，其他四个选项明显错误或者无关。对于B，题干仅仅提到了对病毒的反应，并没有提到抵抗的问题。