The number of RBCs in man increases if he lives at a higher altitude, this is because
there is more oxygen at the mountains
there is less oxygen at mountains
more heat is required to be produced in the body for keeping warm
there are no germs in the air in mountain
B.
there is less oxygen at mountains
To compensate for the decrease in oxygen, one of the body's hormones, erythropoietin (EPO), triggers the production of more red blood cells to aid in oxygen delivery to the muscles.
The largest quantity of air that can be expired after a maximum inspiratory effort is
residual volume
tidal volume
vital capacity of lung
lung volume
Asthma is caused due to :
infection of lungs
infection of trachea
bleeding into pleural cavity
spasm in bronchial muscles
A person breathing normally at rest, takes in and expels approximately half a litre of air during each respiratory cycle. This is called :
tidal volume
vital capacity
inspiratory reserve volume
expiratory reserve volume
The Largest quantity of air that can be expired, after maximal inspiration, is called :
tidal volume
vital capacity
residual volume
total lung volume
In which of the following subjects, the dead space is highest?
Old man
Old woman
Young man
Young woman
Generally artificial pace-maker consists of one battery made up of
nickel
dry cadmium
photo sensitive material
lethium
