Reduction in pH of blood will?

1.	reduce the blood supply to the brain
2.	decrease the affinity of hemoglobin with oxygen
3.	lead to release of bicarbonate ions by the liver
4.	reduce the rate of heartbeat

Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.

Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs:

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

Which one of the following is the correct statement for respiration in humans?

The figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?

   

1.	A – Alveolar cavity – main site of exchange of respiratory gases
2.	D – Capillary wall – exchange of O2 and CO2 takes place here
3.	B – Red blood cell –  transport of CO2 mainly.
4.	C – Arterial capillary – passes oxygen to tissues

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

1. dissolved in the blood

2. as bicarbonates

3. as carbonates

4. attached to haemoglobin