Respiratory System Physiology Test 03 Online Preparation

1. Which of these is termed Bohr effect?

A. None of these

B. Deoxygenation of oxyhaemoglobin is directly proportional to PCO2

C. Increase in CO2 concentration decreases O2 affinity of Hb

D. Oxygen carrying capacity of whole blood is higher than plasma

2. Oxygen capacity of haemoglobin is?

A. The amount of oxygen which 1 gm of haemoglobin can bind

B. The amount of oxygen which is present in blood of alveolar circulation

C. None of these

D. The amount of oxygen which haemoglobin exchanges with similar amount of carbondioxide

3. During one circuit of blood from lungs to the tissue and back through circulatory system the percentages of haemoglobin giving up its oxygen to tissues is?

A. 75%

B. 25%

C. 50%

D. 100%

4. Which of these facts sugests that oxygen is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?

A. Oxygen carrying capacity of whole blood is higher than that of plasma

B. Haemoglobin can combine with oxygen

C. Increase in CO2 concentration decrease the O2 affinity of haemoglobin

D. Oxyhaemoglobin can dissociate into haemoglobin and oxygen

5. Haldane effect states that?

A. Increase the oxygen affinity of haemoglobin

B. None of these facts

C. Oxyhaemoglobin behaves as a strong acid so more and more amount of it formed releases more and more H+ions

D. Deoxygenation of oxyhaemoglobin is directly proportional to PCO2

6. The atmosphere of industrial area loaded with chimines is considered harmful to health because?

A. The air has very low percentage of oxygen

B. There is more and more carbondioxide

C. There is more water vapour which makes breathing difficult

D. There is carbonmomonoxide which can bind with Hb 230 times more than oxygen and its pressure of about 0.7 mm Hg is lethal

7. Deoxygenation of oxyhaemoglobin is?

A. Directly proportional to blood PCO2

B. Directly proportional to PO2

C. Inversely proportional to blood PCO2

D. Inversely proportional to PO2

8. How much oxygen binds with 1 gm of haemoglobin in normal state?

A. 1.0gm

B. 1.34gm

C. 0.75ml

D. 0.5ml

9. A person on inhaling air having well as carbon monoxide suffers from suffocation because?

A. CO affects diaphragm and internal muscles

B. CO affects nerves of the lungs

C. Hb of blood combines with CO instead of O2 and the product cannot dissociate

D. CO reacts with O2 reducing its percentage in the air

10. A catabolic process by which the chemical degradation of body fuel substances is done to obtain energy is called?

A. Metabolism

B. None of these

C. External respiration

D. Tissue respiration

Respiratory System Physiology Test 03 Online Preparation

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