(10 points) what evidence is provided to the reader to show that the information in the article is valid?

a) the information details treatments for asthma.

b) the information explains common causes of asthma.

c) the information comes from the centers for disease control.

d) the information describes the symptoms of an asthma attack.

"what asthma is

1 asthma is a disease that affects your lungs. it is the most common long-term disease of children. it causes repeated episodes of wheezing, breathlessness, chest tightness, and nighttime or early morning coughing.

2 we know that family history contributes to susceptibility, but in most cases we don’t know what causes asthma to develop, and we don’t know how to cure asthma. you can control your asthma by knowing the warning signs of an attack, avoiding things that trigger an attack, and following the advice of your doctor.

effects of asthma

3 in 2001, 20.3 million americans had asthma, and 12 million had had an asthma attack in the previous year. if a person has a parent with asthma, he or she is three to six times more likely to develop asthma than is a person who does not have a parent with asthma.

how asthma is diagnosed

4 asthma can be difficult to diagnose, especially in children under 5 years old. regular physical exams that include checks of lung function and for allergies can make the right diagnosis.

5 a health-care provider trying to diagnose asthma will ask you questions about coughing, especially coughing at night, and whether breathing problems are worse after physical activity or during a particular time of year. providers also ask about other symptoms, such as chest tightness, wheezing, and colds that last more than 10 days.

6 also, a provider will ask about your family history of asthma, allergy and other breathing problems, and your home environment. he or she also will ask about lost school or work days and limits on your activity.

7 testing of lung function, called spirometry, is another way to diagnose asthma. a spirometer is a piece of equipment that measures the largest amount of air you can exhale after taking a very deep breath. airflow can be measured before and after you use an asthma medication.

what an asthma attack is

8 airways are the paths that carry air to the lungs. as the air moves through the lungs, the airways become smaller, like branches of a tree. during an attack, the sides of the airways in your lungs become inflamed and swollen. muscles around the airways tighten, and less air passes in and out of the lungs. excess mucus forms in the airways, clogging them even more. the attack, also called an episode, can include coughing, chest tightness, wheezing, and trouble breathing.

causes of an asthma attack

9environmental exposures, such as house dust mites and environmental tobacco smoke, are important triggers of an attack. some of these triggers are listed in the box below.

how asthma is treated

10 you can control your asthma and avoid an attack by taking your medicine as prescribed and avoiding the triggers that can cause an attack. it’s just as important that you remove the triggers in your environment that you know make your asthma worse.

11 medicine for asthma is different for each person. it can be inhaled or taken as a pill and comes in two types—quick-relief and long-term control. quick-relief medicines control the symptoms of an asthma attack. if you are using your quick-relief medicines more and more you should visit your health-care provider to change your asthma management plan. long-term control medicines make you have fewer and milder attacks, but they don’t you if you’re having an attack."