The partial pressure of CO₂ is minimum in the

1. atmospheric air

2. Alveoli

3. Deoxygenated blood

4. Oxygenated blood

Diffusion membrane consists of

1. Squamous epithelium of alveoli

2. endothelium of alveolar capillaries

3. Basement substance between them

4. All of the above

A curve obtained when percentage saturation of Hb with O₂ is plotted against the pO₂ is also called as

1. Association curve

2. Dissociation Curve

3. Sigmoid Curve

4. Both 2 and 3

How many of the following factors are favourable for the shifting  of Oxyhaemoglobin dissociation Curve to the left side

low pO_2, high pCO₂, more H⁺ Concentration, Higher temperature, High pO_2, Low pCO₂, less H⁺ Concentration, lower temperature.

1. 3

2. 4

3. 5

4. 6

The red coloured, Fe Containing pigment present in the Erythrocytes is

1. Haemoglobin

2. Myoglobin

3. Globin

4. Albumin

The binding of Hb with Carbon dioxide forms

1. Methamoglobin

2. Carbamino-haemoglobin

3. Oxyhaemoglobin

4. none of these

More binding of CO₂ occurs when pCO₂ is _____ and pO₂ is ____

1. high, high

2. low, high

3. high, low

4. low, low

pCO₂ is high and pO₂ is low can be found in

1. alveoli

2. tissues

3. blood

4. heart

In alveoli,

1. pCO₂ is high and pO₂is low

2. pCO₂ is low and pO₂ is high

3. pCO₂ is low and pO₂ low

4. None of the above

The formation of Carbonic acid from Carbon dioxide and water has catalyzed the enzyme

1. Carbonic anhydrase

2. Carbonic anhydride

3. Carbonic hydrase

4. Both A and C