Pratica di Shadowing: Innate Immune System: Simple Overview (Classification, General Factors) - Immunology - Impara a parlare inglese con i video

Creazione lezione...
1
Hello and welcome to another video.
2
This video is mainly going to be about the innate immune system.
3
Now, your immune system uses two main strategies to defeat any type of unwanted invaders.
4
One of the strategies is called the innate immune system and the other one is called the acquired immune system.
5
The innate immune system is mainly present since birth and is therefore sometimes also called the natural immune system.
6
While the acquired, however, forms during a person's lifetime and is therefore sometimes also called the adaptive.
7
Now just remember that the baby also has some type of acquired immune system.
8
I just put the baby there to show you that you've always had the innate immune system ever since you were born.
9
So now let's put this to practice.
10
Imagine we have three different types of bacteria, right?
11
The innate immune system is what we call non-specific because it actually works against any type of agents equally.
12
The adaptive however works very specific as you see right here.
13
And not only that, upon defeating the bacteria, you gain some kind of immunological memory,
14
which usually becomes enhanced upon repeated exposure to the same agents.
15
The innate immunity doesn't really have that.
16
And so let's see how that works.
17
We mainly classify the innate immune system into three different types.
18
The first is what we call general factors.
19
And we've got the cellular factors and also factors and humoral factors.
20
The general factors include physiological barriers at the portal of entry like the skin and mucous membranes.
21
And they're usually, analogically enough, the first line of defense.
22
Next we have the pyrogenic reactions.
23
Now don't get scared if you haven't heard this term before.
24
I'll get more into this later when I talk about the macrophages mainly.
25
pyrogenic reactions often referred to as fever.
26
Some viruses and bacterias cannot really replicate optimally because the body changes its temperature.
27
So that's why we called it the general factors because it works generally by increasing the temperature.
28
Another general factors are secretion.
29
You know, secretion of different enzymes, fatty acids.
30
The cellular Some of the factors are your own microbiota fighting for space in food.
31
Phagocytosis by cells like neutrophils and macrophages.
32
They do that by the different receptors they have on the surface.
33
We also got natural killer cells.
34
They're really important for the antiviral immune response.
35
These cells can bind to the surface of antigens by using toll-like receptors, which usually lead to inflammatory response.
36
Humeral factors which include the complement system and the interference.
37
Now I know this seems a lot but trust me it all gets logical once you understand the concepts.
38
In my opinion
39
if you want to learn immunology properly you need to understand
40
the different parts individually before you can understand the whole concept together in a system.
41
And that's what I'm aiming to show you, everything individually first and then put them all together and show you how this works in a system system.
42
Alright, so in this video I'm mainly going to focus on the general factors
43
because those are really important factors to start with when you want to understand immunology.
44
Now imagine these are your epithelial cells.
45
Let's say this is your skin for example.
46
The first one includes physical barrier where bacteria cannot really enter because of the tight junctions these cells really have.
47
Another mechanism is when the bacteria can't enter because of secreted products,
48
could be free fatty acids released by your gastrointestinal tract or enzymes released at the mucous membrane.
49
So let's do it like that.
50
In the saliva, sweat glands and tears we have something called lysozyme
51
which once secreted out they break down the peptidoglycan layer of the bacterial cell wall.
52
Next you know the gastrointestinal tract?
53
You got some cells in the walls of your stomach called parietal and chief cells.
54
Chief cells can release pepsin which breaks down the proteins of certain bacteria.
55
And parietal cells mainly release hydrochloric acid for lowering the pH.
56
We can also have defensins in the gastrointestinal tract.
57
The list goes on and on.
58
The point is that we secrete out quite a lot of substances as a part of our general innate immunity.
59
Some bacteria can actually get through all of this mess without even getting hurt, and those are the bacteria that usually make us sick.
60
Alright, so what else do we have?
61
You know the normal microbiota you have in your body?
62
They actually protect you by making a hard environment for the foreign bacteria to grow in, by taking up space in food for example.
63
So that's mainly the general factors I wanted to talk about.
64
Now from the cellular factors, we've already talked about the microbiota, limiting the pathogenic bacteria from growing.
65
In my next video we will look at what toleric receptors are and how phagocytosis happens in details and steps in inflammation.
66
Natural killer cells has a cytotoxic mechanism
67
and I feel like it's more logical to talk about it later
68
when I talk about the cellular immune response as it kind of fits more there.
69
Alright, so let's look at these.
📺 Stesso Canale
YouTube Saved My Medical Career | A Cinematic Short FilmB2
2

YouTube Saved My Medical Career | A Cinematic Short Film

Daily ConversationUniversity StudentsWorking Adults
Cerebral Cortex (Function, Covering, Lobes, Sulcus, Gyrus, Fissures) | AnatomyC1
2

Cerebral Cortex (Function, Covering, Lobes, Sulcus, Gyrus, Fissures) | Anatomy

University StudentsWorking Adults
Liver Anatomy (Function, Topography, External Structures, Ligaments)C1

Liver Anatomy (Function, Topography, External Structures, Ligaments)

IELTS PrepTOEFL PrepUniversity Students
✨ Video consigliato
Introduction to the immune systemC1
7
159 frasi

Introduction to the immune system

IELTS PrepTOEFL PrepUniversity Students
Theories of Emotion | Processing the Environment | MCAT | Khan AcademyC1
5
96 frasi

Theories of Emotion | Processing the Environment | MCAT | Khan Academy

IELTS PrepTOEFL PrepUniversity Students
Homeostasis - How Your Body Keeps its Balance - Physiology SeriesC1
6
108 frasi

Homeostasis - How Your Body Keeps its Balance - Physiology Series

IELTS PrepTOEFL PrepUniversity Students
BLOOD TYPES explained in 9 MinutesC1
1
167 frasi

BLOOD TYPES explained in 9 Minutes

IELTS PrepTOEFL PrepUniversity Students
Multiple Myeloma - signs and symptoms, pathophysiology, treatmentC1
2
125 frasi

Multiple Myeloma - signs and symptoms, pathophysiology, treatment

IELTS PrepTOEFL PrepUniversity Students
4 Subject Link 6 C1C1
3
31 frasi

4 Subject Link 6 C1

IELTS PrepTOEFL PrepUniversity Students
Embryology of the Nervous SystemC1
3
186 frasi

Embryology of the Nervous System

IELTS PrepTOEFL PrepUniversity Students
TB - mycobacterium tuberculosis شرح عربيC1
2
116 frasi

TB - mycobacterium tuberculosis شرح عربي

IELTS PrepTOEFL PrepUniversity Students
Fever Feels Horrible, but is Actually Awesome!C1
9
131 frasi

Fever Feels Horrible, but is Actually Awesome!

IELTS PrepTOEFL PrepUniversity Students
What Is Intelligence? Where Does it Begin?C1
4
90 frasi

What Is Intelligence? Where Does it Begin?

IELTS PrepTOEFL PrepUniversity Students
Endocrine SystemB2
2
99 frasi

Endocrine System

IELTS PrepTOEFL PrepUniversity Students
The different types of mutations | Biomolecules | MCAT | Khan AcademyC1
2
41 frasi

The different types of mutations | Biomolecules | MCAT | Khan Academy

IELTS PrepTOEFL PrepUniversity Students

About This Lesson

In questa lezione, praticherai l'ascolto e la pronuncia inglese attraverso un video sull'immunologia, focalizzandoti sul sistema immunitario innato. Imparerai a seguire un discorso tecnico ma chiaro, migliorando la tua capacità di capire e ripetere frasi complesse. Attraverso l'osservazione delle spiegazioni e dei concetti chiave, potrai rafforzare la tua comprensione del linguaggio scientifico inglese e esercitare la tecnica del "shadow speak".

Parole chiave e frasi utili

  • Innate immune system: Sistema immunitario innato
  • Acquired immune system: Sistema immunitario acquisito
  • Nonspecific: Non specifico
  • Phagocytosis: Fagocitosi
  • Complement system: Sistema del complemento
  • Immunological memory: Memoria immunologica

Tips per la pratica

Per esercitare il "shadowspeaks" con questo video, inizia a ripetere le frasi subito dopo l'oratore, mantenendo lo stesso tono e la stessa velocità. Il discorso è chiaro ma con alcuni termini tecnici, quindi concentra la tua attenzione sulle pause tra le parole e sull'intonazione per non perdere il filo. Usa la tecnica del "shadow speech" per migliorare la pronuncia inglese: ascolta una frase, metti in pausa e ripetila immediatamente, cercando di imitare la pronuncia e l'accento. Ripeti le parti più difficili più volte, come le definizioni di "fagocitosi" o "sistema del complemento", finché non le senti naturali. Questo metodo ti aiuterà a rafforzare la memoria muscolare per la lingua inglese e a capire meglio i discorsi tecnici. Ricorda: la chiave è la costanza, quindi pratica ogni giorno per 10-15 minuti e noterai i risultati in poco tempo. Imparare l'inglese con i video è un modo efficace per combinare l'ascolto e la pronuncia, e con il "shadow speak" diventerai più fluido e confidente.

La grammatica di questo video

Le strutture che chi parla usa di più, con le parole esatte del video:

StrutturaNel video
Present perfect have/has + participio passato — un’azione passata che conta ancora adessohaven't heard · we've already talked
Forma passiva be + participio passato — conta ciò che accade, non chi lo fais called · were born

Cos'è la tecnica dello Shadowing?

Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.

Tecnica dello shadowing: leggi la guida completa passo dopo passo →