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
A.
tidal volume
Tidal volume is the amount of air inspired or expired in a single breath by a person at rest. It is about 500 ml for an average adult human male.
Vital capacity is the greatest volume of air that can be expelled from the lungs after taking the deepest possible breath.
Inspiratory reserve volume (IRV) is the additional air that can be forcibly inhaled after the inspiration of a normal tidal volume.
Expiratory reserve volume or ERV is the additional amount of air that can be expired from the lungs by determined effort after normal exiration.
In which of the following subjects, the dead space is highest?
Old man
Old woman
Young man
Young woman
The Largest quantity of air that can be expired, after maximal inspiration, is called :
tidal volume
vital capacity
residual volume
total lung volume
Generally artificial pace-maker consists of one battery made up of
nickel
dry cadmium
photo sensitive material
lethium
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
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
