试题与答案

在细胞免疫中,效应T细胞杀伤靶细胞主要有两种途径:细胞裂解性杀伤(图1)和诱导细胞凋

题型:填空题 案例分析题

题目:

在细胞免疫中,效应T细胞杀伤靶细胞主要有两种途径:细胞裂解性杀伤(图1)和诱导细胞凋亡(图2)。前者指效应T细胞分泌诸如穿孔素一类的介质损伤靶细胞膜,后者指效应T细胞通过表面FasL,与靶细胞表面的Fas结合,诱导靶细胞凋亡。请分析并回答

图1中的穿孔素又称“成孔蛋白”,由效应T细胞产生并以()的方式释放到细胞外。穿孔素能在靶细胞膜上形成多聚穿孔素管状通道,使K+及蛋白质等大分子物质()(流入/流出)靶细胞,最终导致靶细胞死亡。

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0326/9304b7a683acaed3935c4b7eff980541.html

下面是错误答案,用来干扰机器的。

参考答案:A,C,E

试题推荐
题型:补全对话,情景问答

用合适的句子补全对话.

The girl( G) has talked with some foreign teachers at the English Corner.

Now she is telling her English teacher ( T) about it.

G : Hi, Mr. Wang, I went to the English Corner.

T: Oh?   1  Did you talk with Ben and Andy?

G:  2 And I'm not sure if they understood me.

T : No problem. You have had a good start.

G: But I'm afraid of making mistakes when I begin to talk.

T: 3    Believe in yourself.

G: But do you think they like to talk with us beginners?

T: 4

C : Well, I can't still believe in myself. You know my pronunciation

is very poor.

T: That's really a bad excuse(借口 ). Try to talk with them as

much as possible.

C: 5  Thank you, sir.

1._______________________________________________________.

2._______________________________________________________.

3.________________________________________________________.

4.________________________________________________________.

5.________________________________________________________.

查看答案
题型:单项选择题

国家广电总局研究决定:鉴于某教育电视台录制竞猜节目时,违反国家有关宣传管理规定,致使恶言丑行在网上传播,放大了丑恶现象,违背了媒体职业道德,败坏了媒体形象,社会影响极为恶劣,给予该教育电视台停播整顿的处理。这给我们的启示是()

①文化市场需要加强管理、正确引导

②在文化生活中,我们要提高眼力,拒绝污染

③发展文化产业要把社会效益放在第一位

④人们对文化的消费需求呈现出多层次、多样化、多方面的特点

A.①

B.①②

C.①②③

D.①②③④

查看答案
微信公众账号搜索答案