抗体与抗原结合产生细胞集团或沉淀,最后被吞噬细胞吞噬消化
20、细胞免疫(抗原进入细胞)
记忆T细胞
侵入细胞的抗原 T细胞
效应T细胞
效应T细胞作用:使靶细胞裂解,抗原暴露
暴露的抗原会被吞噬细胞吞噬消化
过敏反应:再次接受过敏原
21、免疫失调引起的疾病 自身免疫疾病:类风湿、系统性红斑狼疮
免疫缺陷病:艾滋病
22、过敏反应的特点:发作迅速、反应强烈、消退较快;一般不会破坏组织细胞,
也不会引起组织严重损伤;有明显的个体差异和遗传倾向
第三章:植物的激素调节
1、在胚芽鞘中
感受光刺激的部位在胚芽鞘尖端
向光弯曲的部位在胚芽鞘尖端下部
产生生长素的部位在胚芽鞘尖端
2、胚芽鞘向光弯曲生长原因:
①:横向运输(只发生在胚芽鞘尖端):在单侧光刺激下生长素由向光一侧向背光一侧运输
②:纵向运输(极性运输):从形态学上端运到下端,不能倒运
③:胚芽鞘背光一侧的生长素含量多于向光一侧(生长素多生长的快,生长素少生长的慢),因而引起两侧的生长不均匀,从而造成向光弯曲.
3、植物激素:由植物体内产生、能从产生部位运送到作用部位,对植物的、大、小凌河及松山、杏山、塔山守具,尽驱屯兵入关,委弃米粟十余万,而死亡载途,哭声震野,民怨而军益不振。
点此查看
关于“委弃的读音委弃的读音是什么”这个话题的介绍,今天小编就给大家分享完了,如果对你有所帮助请保持对本站的关注!
tation can be divided into two categories. There radish cake, water chestnut cakes, London cakes, sponge cake, cotton cake, steamed cake, flour cakes, taro cakes, and so on. Guangzhou Snacks Desserts category refers to all kinds of varieties of sweet snacks, not including pasta, Gaotuan included, the use of materials, mostly eggs, milk, plant flowers, fruits, benevolent, etc.; all kinds of red bean, green bean, and wheat glutinous rice porridge , rice pudding, sesame paste, almond paste, dumplings and so on, especially Shuangpi Nai and Ginger milk curd paste is most famous. Guangzhou snack dumplings class has two kinds of sweet rice dumplings and salty dumplings. Guangzhou snacks omnivorous class is not an above-mentioned categories by key is a hodgepodge of materials used for its named to low-cost, flavor variety is known. Including fried river snail, pig hong TANG, bone soup, hot and sour vegetables and so on. Guangzhou snacks class oil (fried foods), or fried snacks, with ric