On an average, a healthy human breathes ______times/minute.
1. 70-72
2. 20-25
3. 12-16
4. 120-80

The volume of air expired forcefully after normal inspiration
1. TV+ IRV
2.TV+ERV
3.TV
4. None of these

The volume of air expired forcefully after forceful inspiration
(1)TV+ IRV

(2)TV+ERV+IRV

(3)TV+ERV+IRV+RV

(4)None of these

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