Test: Exchange of Gases & Transport of Gases (August 4) - NEET MCQ

After a forceful expiration gaseous exchange continues uninterrupted because there is always a residual volume of air that continues the diffusion of gasese.

Vital capacity includes ERV, TV and IRV or the maximum volume of air a person can breathe out after a forced inspiration.

• In the tissues, where low pO₂, high pCO₂, high H+ concentration and higher temperature exist, the conditions are favourable for dissociation of oxygen from the oxyhaemoglobin.
• This clearly indicates that oxygen gets bound to haemoglobin in the lung surface and gets dissociated at the tissues. 

Inspiration is the process of intake of oxygen from the surrounding. This is achieved by increasing the volume of thoracic cavity. Contraction of diaphragm relax the sternum that increae the thoracic cavity.

Epiglottis to prevent the entry of food into the larynx.

Water is released in atmosphere along with expired air during respiratory cycle. Air breathing animals lose a large amount of precious water from their respiratory surface through evaporation.

The partial pressures of carbon dioxide and oxygen, as well as the oxygen saturation of hemoglobin, influence how readily hemoglobin binds carbon dioxide. The less saturated hemoglobin is and the lower the partial pressure of oxygen in the blood is, the more readily hemoglobin binds to carbon dioxide.

Carbon monoxide (CO) a poisonous gas that is emitted from the exhaust system of a combustible engine of an automobile that uses petrol or diesel as a fuel is odourless, colourless, tasteless and nonirritating. Environmental carbon monoxide is produced by incomplete combustion process from any carbon containing fuel.

Hairlike structures called cilia line the mucous membrane and move the particles trapped in the mucus out of the nose. Inhaled air is moistened, warmed, and cleansed by the tissue that lines the nasal cavity.