the larynx is closed
the trachea gets narrowed
the gas exchange area of lungs is increased
the gas exchange area of lungs is decreased
D. the gas exchange area of lungs is decreased
chemicals
physical conditions
nerves
all of these
expiration
inspiration
respiration
oxidation
lack of sufficient amount of haemoglobin
lack of sufficient amount of erythrocytes
arterial hypoxia
anaemic hypoxia
Cells lining the lung cavities
Cells found in blood
All living cells of the body
RBC only
increased alveolar ventilation and increased cardiac output
shift in the haemoglobin dissociation curve to the right
increased erythrocytes and haemoglobin content of blood
all of these
carbohydrates are synthesised
proteins are broken down
fat molecules are metabolised
energy is liberated
less than that in alveolar air
more than that in alveolar air
equal to that in alveolar air
similar to oxygen pressure in the capillaries
Pharynx, larynx, trachea, bronchi and bronchioles
Trachea, bronchi, bronchioles, alveolar ducts and alveoli
Respiratory bronchioles, alveola ducts, alveolar sacs and alveoli
Bronchi, bronchioles, alveolar ducts, alveolar sacs and alveoli
3 per cent
25 per cent
16 per cent
20 per cent
external nares
pharynx
larynx
bronchi
hypercapnia
pulmonary edema
hypoxia
emphysema
vital capacity
residual volume
inspiratory capacity
any of these
the larynx is closed
the trachea gets narrowed
the gas exchange area of lungs is increased
the gas exchange area of lungs is decreased
the oxygen content of the blood
the nitrogen content of the blood
receptors in the larynx
the carbon dioxide content of the bkxxl
flattened and ciliated cells to increase the surface area of lungs
columnar and ciliated cells to increase the surface area of lungs
only ciliated cells to increase the surface area of lungs
only squamous cells to decrease the surface area of lungs
exchange of gases between lungs and blood
cellular respiration
exchange of gases between lungs and atmosphere
respiration in open air
500 ml
1000 ml
2000 ml
3000 ml
sucking-in air
pushing expired air out
pushing mucus out
keeping the alveolar air in circulation
Contract
relax
expand
shows no change
less than that is lung capillaries
equal to that in lung capillaries
double of that in lung capillaries
half of that in lung capillaries
Copper
Magnesium
Iron
Manganese
tidal volume
ventilation rate
residual volume
all of these
absence of oxygen
diminished amount of oxygen delivered to the tissues
both (a) and (b)
none of these
returns highly oxygenated blood to the left heart for distribution throughout the body
returns highly oxygenated blood to right heart for distribution throughout the body.
delivers blood to lungs low in oxygen
delivers highly oxygenated blood in lungs
trachea
bronchi
bronchioles
none of these
25-30 times
10-15 times
14-18 times
20-25 times
cerebral cortex
hypothalamus
medulla oblongata
procencephalon
5000 ml of oxygen per day
5000 ml of oxygen per hour
500 ml of oxygen per hour
200 ml of oxygen per minute
Amoeba
Bed bug
Hydra
Tapeworm
yeast cell in fermentation
a liver cell in glycolysis
an Amoeba in aerobic respiration
a muscle cell in lactic acid formation