81.

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

During inspiration, the diaphragm :

• expands

• shows no change

• contracts and flattens

• relaxes to become dome-saped

The oxygen toxicity is related with:

• blood poisoning

• collapse of alveolar walls

• failure of ventilation of lungs

• both 'a' and 'b'

The 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

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

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

When percentage saturation of haemoglobin with O₂ is
plotted against pO₂ the curve obtained is

• J shaped

• Hyperbola

• Sigmoid

• U shaped

• U shaped

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

The respiratory quotient value of 0.7 is obtained for

• Anaerobic respiration

• Glucose

• Proteins

• Organic acids

• Organic acids