Although much C02 is carried in blood, yet it does not become acidic, because
it is absorbed by the leucocytes
blood buffers play an important role in CO2 transport
it combines with water to form H2C03 which is neutralized by Na2Co3
it is continuously diffused through tissues and is not allowed to accumulate
A spirometer is used to measure
Vital capacity
Residual volume
Total lung capacity
Inspiratory capacity
The process of migration of chloride ions from plasma to RBC and of carbonate ions from RBC to plasma is
chloride shift
ionic shift
atomic shift
Na+ pump
The state, during which the respiratory centre is inhibited, is termed as
Anoxia
Asphyxia
Chocking
Suffocation
Thyroid cartilage is found in
Nose
Pharynx
Larynx
Ear pinna
Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct?
The patient has been inhaling polluted air containing unusually high content of carbon disulphide
The patient has been inhaling polluted air containing unusually high content of chloroform
The patient has been inhaling polluted air containing unusually high content of carbon dioxide
The patient has been inhaling polluted air containing unusually high content of carbon monoxide
The exchange of gases in the alveoli of the lungs, takes place by
Osmosis
Active transport
Passive transport
Simple diffusion
The respiratory centres, which control inspiration and expiration, are located in
Cerebellum
Diencephalon
Spinal cord
Medulla oblongata
The haemoglobin of a human foetus
has a lower affinity for oxygen than that of the adult
its affinity for oxygen is the same as that of an adult
has only 2 protein subunits instead of 4
has a higher affinity for oxygen than that of an adult
During expiration, the diaphragm becomes
Oblique
Normal
Flattened
Dome-shaped
