跟读练习: Physiology Chapter 1 | Introduction to Physiology & Homeostasis Explained - 通过视频学习英语口语

Welcome to another lecture by Medicomedics, Learning Made Easy.

Physiology, Chapter 1, Introduction to Physiology and Homeostasis.

So in this first lecture, we will give you a brief introduction into the subject of physiology, discuss the levels of organization in the body,

present the concept of homeostasis, discuss different components and examples of it, and what happens when the systems are disrupted.

And we will discuss the continuous nature of physiology and end with a summary.

Now, what is physiology?

So physiology is the study of how living organisms function.

It focuses on understanding mechanisms, so how the body works at every level.

An example can be physiology of the heart explains how the heart pumps blood efficiently to sustain life.

So physiology is like a blueprint that explains how everything in the body works together.

Levels of organization in the body.

so let's start at the chemical level where we have atoms

or atoms and molecules like water and proteins this is illustrated right here building on

that we have at the cellular level where we find the basic units of life like nerve cells cardiac cells

and any other cell After that, we reach the tissue level,

so groups of cells working together, like muscle tissue.

Continuing from that, we get to the organ level, where tissues form functional units, for example, the lungs.

Continuing, we get to the system level, where organs performing collective functions.

So, for example, we have the respiratory system.

And continuing on, we get to the organism level, so the body as a whole.

So homeostasis is the body's ability to maintain a stable internal environment despite external changes.

Some examples of regulated variables include body temperature, blood pH, glucose levels in the blood,

and this ensures survival and optimal functioning.

So homeostasis is like being on cruise control.

It keeps your body steady no matter what is going on around you.

Now, what are some components of homeostasis?

Well, the key components include sensors that detect changes in the environment.

For example, thermoreceptors for changes in temperature.

We have the control center processing information and determining responses, like our brain.

Effectors, which act to restore balance, for example, our muscles or glands.

Furthermore, we have something called the negative feedback loop and the positive feedback loop.

Now, negative feedback loops reverse changes to maintain stability.

So, just as a simple example, we have, for whatever reason, an increase in our blood pressure.

There are systems in place where we get alerted or our body gets alerted to the fact that blood pressure has arisen.

So it sets into motion changes to reverse this to reach a stable level.

Obviously, when these natural feedback loops don't function as they're supposed to,

this is when we can start talking about the development of pathologies.

So we might need to assist the patient with medication, for example.

We also have positive feedback loops.

And these amplify changes for specific outcomes.

For example, during childbirth, we want contractions to occur.

Now let's look at an example of homeostasis.

Let's take body temperature.

So the scenario is the body temperature is rising during exercise, right?

Exercise is not a pathology, but our body temperature is increasing during exercise.

What's the response then?

Well, we have sensors detecting this rise in temperature.

Our body temperature is rising during exercise.

What's the response then?

Well we have sensors detecting this rise in temperature.

Our brain activates our sweat glands.

Sweating then cools the body through evaporation.

And the outcome?

Our body temperature returns to normal.

This is a great example of how it's supposed to maintain homeostasis.

Just to give you a little clinical insight here,

we went through that this is during exercise, so this is a normal procedure in day-to-day life, let's say.

But what if body temperature has risen and keeps rising due to an infection?

You have probably at least once in your life experienced having fever.

And if we have an infection, fever might occur.

Now, if that fever keeps increasing to certain levels where the environment

that becomes created due to this elevation of temperature becomes incredibly destabilizing for us

and could lead to failure of organs and eventually even death.

So what do we do then?

Well, we use, for example, antipyretics, so medication to decrease this fever.

One you may know of is, for example, paracetamol or paracetamol.

So in that case, we have an infection, right?

Maybe it's spreading, maybe it's a serious infection.

Our body is not able to maintain its homeostasis.

So this is when your job as a doctor comes in and you identify that the body is not maintaining homeostasis.

This fever is elevating the body temperature way too high.

It's becoming deadly.

So let me give a medication to help decrease this fever

while also treating this infection with antibiotics or whatever it may be.

now what happens then when this this balance of homeostasis actually fails

so disruptions of homeostasis leads to disease

or dysfunction for example diabetes that's a failure to regulate blood

glucose levels a heat stroke is the inability to regulate the temperature.

So restoring homeostasis is the aim of medical interventions.

To understand diseases, we must first master physiology's role in maintaining balance.

Because remember, just like when we went through anatomy or studied anatomy,

you learned, first of all the anatomical position or the anatomic position

and then you reference everything else to that

so you have a reference point

so you don't get lost it's the same here we start with homeostasis what is the normal

and when you go to the doctor you take some blood tests there is always some ranges you are given

and if it's above that range there is a mark usually or if it's below that,

these ranges somehow indicate homeostasis in a way.

And when whatever value deviates from that, there is a disruption, probably due to some disease or dysfunction at some level.

Now, physiology and clinical practice.

So what are some clinical applications of physiology?

For example, blood pressure monitoring ensures cardiovascular homeostasis.

Blood sugar tests evaluate for glucose regulation.

Ventilation adjustments in critical care help maintain oxygen balance.

Now, physiology is dynamic, so the body continuously adapts to internal and external changes.

Systems are interdependent, so changes in one system very often affect other systems.

For example, stress activates the nervous system, the endocrine system, and the cardiovascular system.

So in summary then, physiology explains how the body functions and stays balanced.

Homeostasis is critical for health.

100

Disruptions lead to disease.

101

Understanding physiology is essential for diagnosing and treating illnesses.

102

And that's the end of our first chapter.

103

Continue now to chapter 2.

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✨ 推荐视频

108 句

本课的词汇与口语要点

这节 C1 级别的口语课以视频“Physiology Chapter 1”为素材。视频中反复出现的词有：example, homeostasis, physiology, temperature, blood。这段视频共有 103 个句子、1125 个单词可供跟读。讲话部分时长为 10:06。说话人语速平稳，每分钟约 111 个词，很适合跟读。只有 79% 的单词属于英语最常用的 3,000 词，词汇难度较高。

视频中的重点词汇

视频中最难的 15 个单词，附发音和释义：

单词	发音	释义
homeostasis 名词	/ˌhoʊ.mi.oʊˈsteɪ.sɪs/	穩態 /稳态, 恆定狀態 /恒定状态
physiology 名词	/ˌfɪziˈɑ.lə.d͡ʒi/	生理, 生理學 /生理学
regulate 动词	/ˈɹɛɡ.jə.leɪt/	調節 /调节
sensor 名词	/ˈsɛn.sɚ/	傳感器 /传感器
detect 动词	/dɪˈtɛkt/	察覺 /察觉, 發覺 /发觉
gland 名词	/ɡlænd/	腺體 /腺体, 腺
dysfunction 名词	/dɪsˈfʌŋk.ʃən/	功能障礙 /功能障碍
pathology 名词	/pəˈθɒləd͡ʒi/	病理學 /病理学
organism 名词	/ˈɔɹ.ɡəˌnɪz.əm/	生物, 有機體 /有机体
cardiovascular 形容词	/ˌkɑːdi.əʊˈvæskjʊlə(ɹ)/	心血管
atom 名词	/ˈætəm/	原子
activate 动词	/ˈæktɪˌveɪt/	激活
anatomy 名词	/əˈnætəmi/	解剖學 /解剖学, 解剖
blueprint 名词	/ˈbluːˌpɹɪnt/	藍圖 /蓝图
childbirth 名词	/ˈt͡ʃaɪldˌbɝθ/	分娩, 生產 /生产

视频中出现的短语动词

单词	释义
go through 动词	通過 /通过

视频中的语法

说话人最常用的结构，并附上视频中的原话：

结构	视频中的用法
被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的	are disrupted · is illustrated · are given
现在完成时 have/has + 过去分词 — 过去发生但与现在仍有关联的事	has arisen · has risen

需要注意的发音

说话人用了 3 次缩略和弱读形式，例如 don't, they're。请按听到的简短形式来说。

“th” 音: pathology /pəˈθɒləd͡ʒi/, childbirth /ˈt͡ʃaɪldˌbɝθ/
“sh” 和 “zh” 音: disruption /dɪsˈɹʌpʃən/, dysfunction /dɪsˈfʌŋk.ʃən/, contraction /kənˈtɹækʃ(ə)n/, evaporation /ɪˌvæpəˈɹeɪʃən/, ventilation /ˌvɛntɪˈleɪʃ(ə)n/
长单词——注意重音位置: homeostasis /ˌhoʊ.mi.oʊˈsteɪ.sɪs/, physiology /ˌfɪziˈɑ.lə.d͡ʒi/, paracetamol /ˌpɛɹ.əˈsiː.təˌmɔl/, pathology /pəˈθɒləd͡ʒi/, organism /ˈɔɹ.ɡəˌnɪz.əm/

中文母语者容易读错的音：

/v/ — 不要读成 /w/，上齿轻触下唇: cardiovascular /ˌkɑːdi.əʊˈvæskjʊlə(ɹ)/, activate /ˈæktɪˌveɪt/, deviate /ˈdiː.vi.eɪt/, elevate /ˈɛləveɪt/, evaporation /ɪˌvæpəˈɹeɪʃən/
词尾辅音 — 要读清楚，后面不要加元音: homeostasis /ˌhoʊ.mi.oʊˈsteɪ.sɪs/, glucose /ˈɡluː.kəʊz/, regulate /ˈɹɛɡ.jə.leɪt/, detect /dɪˈtɛkt/, gland /ɡlænd/
/r/ 和 /l/ 的区别: regulate /ˈɹɛɡ.jə.leɪt/, paracetamol /ˌpɛɹ.əˈsiː.təˌmɔl/, cardiovascular /ˌkɑːdi.əʊˈvæskjʊlə(ɹ)/, blueprint /ˈbluːˌpɹɪnt/, illustrate /ˈɪl.əˌstɹeɪt/

如何用这段视频练习

先完整听一遍视频，不要开口，记下不认识的单词。
用正常速度逐句跟读，每句重复到你的节奏与说话人一致为止。
录下自己的声音并与原声对比，特别注意 homeostasis, physiology, regulate 这类单词。

什么是跟读法？

跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。

影子跟读法: 阅读完整分步指南 →

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