A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissue. This O2
Raise the pCO2 of blood 75 mm of Hg.
Is enough to keep oxyhaemoglobin
helps in releasing more O2 to the epithelial tissues
acts as a reserve during muscular exercises
Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of :
Inspiratory Reserve Volume
Expiratory Reserve Volume
Reduction is vascular tissue, mechanical tissue and cuticle is characteristic of
Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?
One can breathe out air totally without oxygen
One can breathe out air through eustachian tubes by closing both the nose and the mouth
One can consously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all
The lungs can be made fully empty by forcefully breathing out all air from them
Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of