Pratique du Shadowing: Physiology Chapter 1 | Introduction to Physiology & Homeostasis Explained - Apprendre l'anglais à l'oral avec la vidéo

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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108 phrases

Vocabulaire et conseils d’expression pour cette leçon

Cette leçon d’expression orale de niveau C1 s’appuie sur la vidéo « Physiology Chapter 1 ». Les mots qui reviennent le plus souvent : example, homeostasis, physiology, temperature, blood. Cette vidéo contient 103 phrases et 1125 mots à répéter en shadowing. La partie parlée dure 10:06. Le locuteur parle à un rythme régulier d’environ 111 mots par minute, confortable pour le shadowing. Seuls 79 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.

Vocabulaire clé de cette vidéo

Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :

Mot	Prononciation	Sens
homeostasis nom	/ˌhoʊ.mi.oʊˈsteɪ.sɪs/	homéostasie
physiology nom	/ˌfɪziˈɑ.lə.d͡ʒi/	physiologie
disruption nom	/dɪsˈɹʌpʃən/	interruption, perturbation
glucose nom	/ˈɡluː.kəʊz/	glucose
regulate verbe	/ˈɹɛɡ.jə.leɪt/	régler
sensor nom	/ˈsɛn.sɚ/	détecteur, capteur
detect verbe	/dɪˈtɛkt/	déceler, détecter
gland nom	/ɡlænd/	glande
dysfunction nom	/dɪsˈfʌŋk.ʃən/	dysfonctionnement, dysfonction
pathology nom	/pəˈθɒləd͡ʒi/	pathologie
organism nom	/ˈɔɹ.ɡəˌnɪz.əm/	organisme
cardiovascular adjectif	/ˌkɑːdi.əʊˈvæskjʊlə(ɹ)/	cardiovasculaire
atom nom	/ˈætəm/	atome
activate verbe	/ˈæktɪˌveɪt/	actionner, activer
anatomy nom	/əˈnætəmi/	anatomie

Les verbes à particule que vous entendrez

Mot	Sens
go through verbe	traverser

La grammaire de cette vidéo

Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :

Structure	Dans la vidéo
Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait	are disrupted · is illustrated · are given
Present perfect have/has + participe passé — une action passée qui compte encore maintenant	has arisen · has risen

Prononciation à surveiller

Le locuteur utilise 3 contractions et formes réduites, comme don't, they're. Prononcez-les sous leur forme courte, telles que vous les entendez.

Les sons « th »: pathology /pəˈθɒləd͡ʒi/, childbirth /ˈt͡ʃaɪldˌbɝθ/
Les sons « sh » et « zh »: disruption /dɪsˈɹʌpʃən/, dysfunction /dɪsˈfʌŋk.ʃən/, contraction /kənˈtɹækʃ(ə)n/, evaporation /ɪˌvæpəˈɹeɪʃən/, ventilation /ˌvɛntɪˈleɪʃ(ə)n/
Mots longs — placez bien l’accent: homeostasis /ˌhoʊ.mi.oʊˈsteɪ.sɪs/, physiology /ˌfɪziˈɑ.lə.d͡ʒi/, paracetamol /ˌpɛɹ.əˈsiː.təˌmɔl/, pathology /pəˈθɒləd͡ʒi/, organism /ˈɔɹ.ɡəˌnɪz.əm/

Les sons difficiles pour les francophones :

/tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: physiology /ˌfɪziˈɑ.lə.d͡ʒi/, pathology /pəˈθɒləd͡ʒi/, childbirth /ˈt͡ʃaɪldˌbɝθ/, adjustment /əˈd͡ʒʌst.mənt/
/r/ anglais — langue recourbée, sans frotter la gorge: disruption /dɪsˈɹʌpʃən/, regulate /ˈɹɛɡ.jə.leɪt/, paracetamol /ˌpɛɹ.əˈsiː.təˌmɔl/, organism /ˈɔɹ.ɡəˌnɪz.əm/, cardiovascular /ˌkɑːdi.əʊˈvæskjʊlə(ɹ)/

Comment s’entraîner avec cette vidéo

Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme homeostasis, physiology, disruption.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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