Human beings have a significant ability to maintain and moderate the respiratory rhythm. This is done by neural control. Which of the following is not related with respiration ?

1. Pneumotaxic centre

2. Respiratory rhythm centre

3. Hypothalamus

4. Aortic and carotid body receptors

During inspiration, the diaphragm

1. Contracts

2. Expands

3. Does not move

4. Relaxes

A healthy man can inspire or expire approximately _____ of air per breath normally

1. 500 ml

2. 1000 ml to 1100 ml

3. 1100 ml to 1200 ml

4. 6000 ml to 8000 ml

Total volume of air accommodated in the lungs at the end of maximum forceful inspiration includes 

A. ERV + RV

B. IRV + ERV

C. TV + IRV + ERV + RV

D. VC + RV

1. A only

2. A & B only

3. C only

4. C & D only 

What percentage of haemoglobin is saturated with oxygen in the blood at ${\mathrm{pO}}_2$ 30 mm Hg and ${\mathrm{pCO}}_2$ 40 mm Hg ?

1. 50 %

2. 85 %

3. 90 %

4. 98 %

Which of the following statements is correct regarding ${\mathrm{CO}}_2$ $\mathrm{and}$ ${\mathrm{O}}_2$ transport in blood ?

1. 100 ml of oxygenated blood carries 53 ml of ${\mathrm{O}}_2$

2. 100 ml of blood always transport equal amounts of ${\mathrm{O}}_2$ $\mathrm{and}$ ${\mathrm{CO}}_2$

3. 100 ml of oxygenated blood delivers more ${\mathrm{O}}_2$ than ${\mathrm{CO}}_2$ to the tissues

4. ${\mathrm{O}}_2$ $\mathrm{and}$ ${\mathrm{CO}}_2$ are both maximally transported through the blood plasma 

Given below are the partial pressures (in mmHg) of oxygen and carbondioxide at different parts involved in diffusion in comparison to those in atmosphere.

Choose the correct option with respect to the values of partial pressures (in mmHg) marked as A, B, C and D

At 40 mmHg of partial pressure of oxygen haemoglobin is ______ saturated

1. 50 %

2. 75 %

3. 85 %

4. 35 %

Carbon dioxide generated in the tissue is carried in venous blood primarily as

1. Dissolved gas in plasma

2. Carbamino hemoglobin

3. Sodium bicarbonate in venous blood

4. Potassium bicarbonate in venous blood

Given below are four statements A-D each with one or two blanks. Select the option which correctly fills up the blanks in two statements.

A. Healthy man can inspire or expire approximately $\underline{ \left(\mathrm{i}\right) }$ ml of air per minute.

B. Inspiratory reserve volume average $\underline{ \left(\mathrm{i}\right) }$ ml.

C. Residual volume averages $\underline{ \left(\mathrm{i}\right) }$ ml.

D. Volume of air accumulated in the lungs at the end of forced inspiration is $\underline{ \left(\mathrm{i}\right) }$.

Options :

1. A - (i) 500 ml,

    B - (i) 2500 to 3000 ml

2. B - (i) 2500 to 3000 ml,

    C - (i) 1000 ml to 1100 ml

3. C - (i) 1000 ml to 1100 ml

    D - (i) Vital capacity

4. A - (i) 6000 to 8000 ml

    D - (i) Vital capacity + residual volume