Page 155 - Biology Form Two
P. 155
Biology for Secondary Schools
(iii) Fever substances called allergens which
(iv) Coughing include dust, pollen, spores, and
(v) Headaches animal fur;
(ii) hereditary diseases of the
Prevention and control of acute respiratory system;
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bronchitis (iii) extremely cold weather; and
(i) Staying warm. Cold temperatures (iv) frequent viral or bacterial lung
make the body more susceptible infections.
to bacterial infections.
(ii) Early treatment for all respiratory Signs and symptoms of asthma
infections. (i) Narrowing of bronchioles resulting
in breathing difficulties and a
wheezing or hissing sound when
Chronic bronchitis breathing.
Chronic bronchitis is caused by heavy
smoking and recurrent acute bronchitis. (ii) Excessive production of mucus.
(iii) Dilation of blood vessels, leading
Signs and symptoms of chronic to low blood pressure. Low blood
bronchitis pressure can be fatal.
(i) Coughing, with the production of
thick sputum Prevention and control of asthma
(ii) Breathing difficulties (i) Avoid allergens.
(ii) Get treatment for respiratory
Prevention and control of chronic infections as early as possible.
bronchitis (iii) Keep the body warm.
(i) Avoid smoking (iv) Muscle relaxants in the form of
(ii) Avoid very smoky or dusty areas sprays, pills, and injections are
(iii) Live in a well-ventilated house used to prevent the narrowing of
bronchioles.
(iv) Keep your body warm
(v) Seek medical help Lung cancer
The main cause of lung cancer is
Asthma smoking. Nicotine in cigarette smoke
Asthma can be caused by stops the cilia in the trachea from
(i) allergic reactions. Allergy is expelling foreign materials. This leads
a severe sensitivity to certain to respiratory infection.
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BIOLOGY FORM 2 NEW.indd 149
