学年

質問の種類

生物 高校生

この問題と、電位依存性ナトリウムポンプや電位依存性カリウムチャネルが出てくるものとはなにがちがうのですか?後者は興奮とは関係ないのですか?

[知識] 259. 興奮の伝達次の文章を読み,以下の各問いに答えよ。 ニューロンの接続部であるシナプスでは, シナプス前細胞の神経終末まで興奮が伝導す ると,電位依存性( 1 ) チャネルが開き、神経終末内に(1) イオンが流入する。こ の結果,神経終末にある(2)のエキソサイトーシスが誘発され,内部に含まれる神経 伝達物質が( 3 )に放出される。シナプス後細胞には,神経伝達物質の(4)となる 伝達物質依存性イオンチャネルがあり、伝達物質が結合するとイオンチャネルが開き, シ ナプス後細胞内にイオンが流入する。 これによって, シナ 神経終末 プス後細胞の膜電位が変化し,興奮などの反応が引き起こ される。このとき開いたイオンチャネルが( 5 ) チャネ ルであると, シナプス後細胞内に ( 5 ) イオンが流入し てっ 膜電位を上昇させる。 一方, 開いたイオンチャネル が塩化物イオンチャネルであると, シナプス後細胞内に ① (2) (3) 製品オク |神経伝達 に適語を入れよ 物質 塩化物イオンが流入し, 膜電位を低下させる。 5

回答募集中 回答数: 0
英語 高校生

教えてほしいです

3 次の英文を読み, 空所に入れるのに最も適切なものを, それぞれ下の①~④のうちから一つずつ選びなさい。 Cigarette smoking has negative effects not only on the body of the person who smokes but also on the body of someone who regularly breathes in second-hand smoke. Some of the most obvious effects are high blood pressure, sleep disorders, heart failure, and lung cancer. Despite such harmful consequences, ( 10 ). It has been reported that smoking creates feelings of pleasure, reduces tension, and promotes close relationships. Many smokers admit that smoking is a bad habit. ( 11 ), they tend to think that the number of cigarettes that they smoke is below the danger level and thus are not worried about the risk. Some even feel that they do not breathe in the smoke and that a cure for cancer will be found before they become ill with the disease. We have to admit that smoking is a habit which is difficult to break ( 12 ) the nicotine found in tobacco goes into the blood and stimulates the brain, making smokers feel pleasant for several minutes. What is more, the smoker usually feels anxious and wants to have another cigarette. ( 13 ) the policies that now ban smoking in most public areas, the stress that people often experience at work and at home can force them to smoke. ( 10 ) ①some people decide to stop smoking millions of people continue to smoke ( 11 ) the price of cigarettes has risen ①smoking is more harmful than drinking Therefore 2 While ③ Of course 4 However (12) 1 because 2 as a result 3 but SO (13) ①Despite 2 Although (3) But 4 Yet

回答募集中 回答数: 0
英語 高校生

英語の長文です どこに文法表現があるか知りたいです! よろしくお願いします。

5 UNIT3 Reading Passage 10 15 20 20 25 30 Listening When important events are happening around the world, most people turn to traditional media sources, such as CNN and BBC,¹ for their news. However, during the invasion of Iraq by the United States and its allies in early 2003, a significant number of people followed the war from the point of view of an anonymous² Iraqi citizen who called himself "Salam Pax" (salam means "peace" in Arabic, and pax means "peace" in Latin). Salam Pax wrote a diary about everyday life in Baghdad during the war, and posted it on his web site. Pax's online diary was a kind of web site known as a "blog." Blogs, short for "web-logs," are online diaries usually kept by individuals, but sometimes they are written by companies and other groups of people. They are a rapidly growing type of web site on the Internet. There are estimated to be several hundred thousand blogs on the Internet, and with the popularity of other social media sites, the number of people writing online about their lives continues to grow. may find A blog differs from a traditional web site in several ways. Most importantly, it is updated much more regularly. Many blogs are updated every day, and some are updated several times a day. Also, most blogs use special software or web sites which are specifically aimed at bloggers, so you do not need to be a computer expert to create your own blog. This means that ordinary people who computers difficult to use can easily set up and start writing their own blog. In 2003, the Internet company AOL³ introduced their own blogging service, enabling its 35 million members to quickly and easily start blogging. There are many different kinds of blogs. The most popular type is an online diary of links, where the blog writer surfs the Internet and then posts links to sites or news articles that they find interesting, with a few comments about each one. Other types are personal diaries, where the writer talks about their life and feelings. Sometimes these blogs can be very personal. There is another kind of blogging, called "moblogging," short for "mobile blogging." Mobloggers use cell phones to take photo's, which are posted instantly to the Internet. When the content and images posted online involve news subjects, mobloggers become citizen journalists. In fact, the Korean web site OhMyNews was a well known source for articles from international citizen journalists. However, in 2010, OhMyNews stopped posting new articles. Instead, it is now a blog site where citizen journalists can choose what makes the headlines, or just share ideas about how regular people are changing the news world. Anyone who visits the web site of a big media company can clearly see how the idea of blogging has changed the reporting of news. Quite often, a list of reader comments follow news articles. It seems that the news is becoming less like a report or a lecture, and more like a conversation, where anyone can join in. CNN, BBC Cable News Network, British Broadcasting Corporation anonymous not named; unknown 3 AOL America Online

回答募集中 回答数: 0