【PTE干货】PTE 高频summarize spoken test精析 （十七：Acids and bases）
Acids and bases
主要内容介绍：这段上课的录音是一段关于acids and bases 的课程录音
What’s up guys? It’s Bucky and welcome to your 5th biology tutorial. In this tutorial I want to answer the question that I asked you guys at the end of last video, that is why are we learning about acids and bases. It seems like it’s kind of like chemistry term and we’re talking about biology, so what the heck? Well, remember a couple of tutorials ago, I said that every living thing is made up of these smaller living things called cells. Now a cell is essentially just a bundle of chemicals. It’s just organized in a very specific and organized way. Now in the last video I said an acid is a molecule that splits apart in water and whenever it do it released a hydrogen ion H+. Now a base is essentially the same thing except when the base splits apart in water, it releases hydroxide which is OH -. The important thing to remember is that these are charged particles and a cell remember is basically just a bunch of chemicals organized in a very specific careful kind of way. Now if you’re familiar with chemistry and chemical reactions you know that any time you want to mess up a chemical you need to throw some charged particles into the mix and that’s what happens whenever you have charged particles from acids and bases in your body. So whenever you drink a bunch of battery acid or eat a bunch of baking soda this is what happens …
Biology tutorial 生物课程
Acids and bases 酸碱理论
A bundle of 一系列的
Charged particles 带电元素
Chemical reactions 化学反应
Battery acid 电池液
This lecture introduces the acids and bases in the discourse of biology.
In the previous tutorial, the speaker mentioned that every living thing is made up of smaller living things called cell, which is a bundle of chemicals. They are organized in a specific way and if we want to mess up a chemical we have to throw some charged particles into the mix.
For example, if we drink battery acid or eat baking soda, there is a chemical reaction going on in our bodies.
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