CBSE
Multiple Choice QuestionsThe respiratory centre in the brain is stimulated by
CO2 concentration in venous blood
O2 concentration in artery blood
CO2 concentration in artery blood
O2 concentration in venous blood
The 'respiratory quotient' of fat is
0.7
1.5
1
2
The vital capacity of human being is about
1200 mL
4800 mL
2400 mL
3600 mL
When percentage saturation of haemoglobin with O2 is
plotted against pO2 the curve obtained is
J shaped
Hyperbola
Sigmoid
U shaped
U shaped
The oxygen toxicity is related with:
blood poisoning
collapse of alveolar walls
failure of ventilation of lungs
both 'a' and 'b'
To generate pressure gradients to facilitate expiration and inspiration, the human body uses the intercostal muscles and
alveolar sacs
bronchi
primary, secondary and tertiary bronchioles
diaphragm
diaphragm
The volume of air that will remain in the lungs after a normal expiration is called
vital capacity
functional residual capacity
residual volume
total lung capacity
total lung capacity
In respiration from 180g of glucose which of the following is formed?
264gm CO2 + 190gm H2O + 391 Kcal
264gm CO2 + 108gm H2O + 686 Kcal
390gm CO2+ 108gm H2O + 686 Kcal
390gm CO2 + 264gm H2O + 391 Kcal
During inspiration, the diaphragm :
expands
shows no change
contracts and flattens
relaxes to become dome-saped
The respiratory quotient value of 0.7 is obtained for
Anaerobic respiration
Glucose
Proteins
Organic acids
Organic acids
