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Breathing and Exchange of Gases

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Write brief notes on pharyngitis, laryngitis, bronchitis, asthma.

Pharyngitis : It is an inflammation of pharynx often called sore throat. It may accompany the common cold and it usually involves the tonsils (tonsilitis).

Laryngitis : It is an inflammation of larynx that often accompanies pharyngitis. In laryngitis inflammation of larynx disturbs the vibration of vocal cords and the person has difficulty in speaking.

Bronchitis : It is an inflammation of the bronchi. The lining of bronchi swells and produces excess mucus.

Asthma : It is more correctly called bronchial asthma. It is  caused due to an allergic reaction to foreign substances that affect the respiratory tract. Allergens stimulate the release of histamine from the mast cells. Histamine has several effects, one of which is to cause bronchial smooth muscle to contract. 

146 Views

By what amount the solubility of carbondioxide is more than the solubility of oxygen?

20 - 25 times
414 Views

Oxygen is carried by haemoglobin as?

Oxyhaemoglobin.
415 Views

Name the cavity having lungs.

Thoracic cavity.
448 Views

70% of carbondioxide is transported as ?

Bicarbonate
360 Views

What is the partial pressure of oxygen in  oxygenated blood ?

95 mm Hg
702 Views