Breathing and Exchange of Gases PYQs

In humans, respiration occurs in the following steps. Arrange these steps in the correct order: A. Diffusion of O₂ and CO₂ between blood and tissues B. Diffusion of O₂ and CO₂ across alveolar membrane C. Pulmonary ventilation by which atmospheric air is drawn in and CO₂ rich alveolar air is released out D. Cellular respiration E. Transport of gases by the blood Choose the correct answer from the options given below:

Match List-I with List-II. Choose the correct answer from the options given below :

The partial pressures (in mm Hg) of oxygen (O₂) and carbon dioxide (CO₂) at alveoli (the site of diffusion) are:

Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?

Match the items given in Column I with those in Column II and select the correct option given below:

The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and/or characteristic.

Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

Bulk of carbon dioxide $CO_2$ released from body tissues into the blood is present as:

People living at sea level have around 5 million RBC per cubic millimetre of blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude:

Which one of the following statements is incorrect?

The majority of carbon dioxide produced by our body cells is transported to the lungs: