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Asthma is caused by swelling (inflammation) of the breathing tubes that carry air in and out of the lungs. This makes the tubes highly sensitive, so they temporarily narrow. It may happen randomly or after exposure to a trigger. Common asthma triggers include: allergies (to house dust mites, animals or pollen, for example)
In asthma, the narrowing is reversible, meaning that with appropriate treatment or on their own, the muscular contractions of the airways stop, inflammation resolves so that the airways widen again, and airflow into and out of the lungs returns to normal.
1 de nov. de 2023 · Asthma is a chronic disease that causes swelling in the airways that carry air in and out of the lungs. When an asthma attack occurs, it becomes hard to breathe. Without proper care, severe symptoms can threaten your life.
The most important characteristic of asthma is narrowing of the airways that can be reversed. The airways of the lungs Overview of the Respiratory System To sustain life, the body must produce sufficient energy. Energy is produced by burning molecules in food, which is done by the process of oxidation (whereby food molecules are combined with...
5 de oct. de 2023 · Asthma is usually a lifelong disease of inflammation in the lungs caused by an overactive immune system. Inflammation in the lungs includes the tightening of muscles around airways, swelling of tissues in the airways and the release of mucus that can block airways. When this happens, it's difficult to breathe.
24 de jun. de 2023 · All of these mechanisms together change the compliance of the lungs slightly to increase the work of breathing. There are two phases of an asthma exacerbation, which include the early phase and the late phase. The early phase is initiated by IgE antibodies that are sensitized and released by plasma cells.
22 de ago. de 2022 · An asthma attack can diminish airflow. Sometimes, even with a stethoscope, your healthcare provider may have trouble hearing lung sounds as you breathe. This means you may not be getting enough air into your lungs. It can also mean you have a problem other than asthma, such as a buildup of fluid in or around the lungs.
