问题
问答题 简答题
宿主对寄生虫的免疫应答有几种?
答案
参考答案:
(1)非特异性免疫:即先天性免疫。这是在宿主进化过程中形成的一种免疫,具有遗传性和种的特征。
(2)特异性免疫,即获得性免疫。寄生虫侵入宿主后的排泄分泌物对宿主而言均为"异己",从而刺激宿主的免疫系统产生免疫应
答,对寄生虫可发挥杀伤和清除作用。其免疫效应又可分为体液免疫和细胞免疫以及体液和细胞免疫的协同作用。
宿主对寄生虫的免疫应答有几种?
参考答案:
(1)非特异性免疫:即先天性免疫。这是在宿主进化过程中形成的一种免疫,具有遗传性和种的特征。
(2)特异性免疫,即获得性免疫。寄生虫侵入宿主后的排泄分泌物对宿主而言均为"异己",从而刺激宿主的免疫系统产生免疫应
答,对寄生虫可发挥杀伤和清除作用。其免疫效应又可分为体液免疫和细胞免疫以及体液和细胞免疫的协同作用。
根据句意及常识为下列各题选一个节日填空。 | |
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1. At_______, we play a game called "trick or treat". 2. My favourite festival is______ because I like to eat mooncakes. 3. People will play with different kinds of lanterns of different shapes and eat "Yuanxiao" at_______. 4. _______is the fourth Thursday of November. It started in 1621 in the USA. 5. _______is the most important festival in western countries. It falls on December 25th. 6. _______is on October 1st in China. Now every year on this day we have seven days off. 7. On_______, some people play tricks on each other. 8. September 10th is_______. On that day teachers can get many best wishes from their students. 9. —What do you eat at_______? —We can eat rice dumplings. 10. _______is the most important traditional festival in China. It usually comes in February. |