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ASTMA KEMI Y PAULA E. 3ºB

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Subido el 15 de febrero de 2018 por Bárbara M.

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Asthma is a long-term condition that can be managed but not cured. 00:00:00
It starts with a go or a whiz. Soon your chest feels tight, your breathing speeds up. 00:00:06
These are common symptoms of an asthma attack. 00:00:14
Around the world, more than 300 million people suffer from asthma and 250,000 people die from it each year. 00:00:17
But why people get asthma and how can this disease be deadly? 00:00:24
Asthma affects the respiratory system, particularly the smaller airways, such as the bronchi and the bronchioli. 00:00:31
These airways have an inner lining called the mucosa that's surrounded by a layer of a small muscle. 00:00:38
In people with asthma, the airways are chronically inflamed, which can make them hyper-responsible to certain triggers. 00:00:45
Some of many asthma triggers include tobacco smoke, pollen, dust, fragrances, exercise, 00:00:53
cool weather, stress and even the common cold. 00:01:02
When people with asthma are exposed to these triggers, an asthma attack or exacerbation 00:01:06
can occur. 00:01:12
But how exactly do such everyday factors lead to an asthma attack? 00:01:14
If an asthmatic is exposed to trigger, the smooth rings of muscle that circulate the 00:01:19
small airways in the lungs contract and become narrow. 00:01:24
Simultaneously, the trigger worsens inflammation, causing the mucosal lining to become more 00:01:28
swollen and secrete more mucus. 00:01:33
Under normal conditions, the body uses the mucus to trap and clear particles, like pollen 00:01:35
or dust, but during an asthma attack, it blocks the narrowed airways, making it even harder 00:01:41
to breathe. 00:01:46
this effect lead to symptoms of asthma smooth muscle constriction results in the feeling of 00:01:47
chest tightness excess mucus and increase of inflammation can cause cough and the wheezing 00:01:53
noise that happens because the airway constricts air whistles and passes through the narrowed space 00:02:00
these symptoms may make a person feel like they are running out of air during an asthma attack 00:02:08
the inflammation can make it harder to exhale and inhale. Over time, this leads to an excess of air 00:02:13
in lungs. A phenomenon known as hyperinflation, the dropping of air inside the lungs forces the 00:02:19
body to work harder to move air in and out of them. Over time, this can lead to reduced oxygen 00:02:26
delivery to the body's organs and tissues. Sometimes, it can lead to death from lack of 00:02:32
oxygen. So how do we prevent these fatal attacks in people with asthma? One way is to reduce the 00:02:37
presence of triggers unfortunately the world is at a predictable place that can't always be controlled 00:02:43
this is where inhalers come in this medication helps asthmatics to prevent their asthma symptoms 00:02:49
inhalers transport medication along the affected areas to treat the problem that at its source 00:02:55
they come into form ones which treat symptoms immediately and contain beta agonist relaxed 00:03:01
constricted muscles allowing the airways to widen so more air can travel into and out of the lung. 00:03:08
The other form of inhalers which treats asthma symptoms over the long term contain corticosteroids. 00:03:15
Corticosteroids reduce airway sensibility and inflammation so asthma can be kept under control. 00:03:21
They are also crucial in preventing long-term damage from chronic inflammation. 00:03:27
Inhalers are known to be very effective although we've come a long way improving we still don't 00:03:32
know its exact cause. Currently, we believe that a combination of genetic and environmental 00:03:37
factors play a role in potential action during early childhood. This may be due to exposure 00:03:43
to additional pollutants and environmental irritants. As our understanding of asthma improves, 00:03:49
we can continue to find better ways to keep people's airways happy and healthy. 00:03:55
Subido por:
Bárbara M.
Licencia:
Reconocimiento - No comercial - Compartir igual
Visualizaciones:
73
Fecha:
15 de febrero de 2018 - 20:47
Visibilidad:
Público
Centro:
IES ALPAJÉS
Duración:
04′ 31″
Relación de aspecto:
1.78:1
Resolución:
1920x1080 píxeles
Tamaño:
93.12 MBytes

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