Transport of Oxygen

Q.

What is the molecular formula of hemoglobin?

Q.

How does the transport of O₂ and CO₂ by blood happen?

1. With the help of platelets and corpuscles

2. With the help of WBCs and blood serum

3. With the help of RBCs and WBCs

4. With the help of RBCs and blood plasma

Q.

Which factors favour binding of oxygen with haemoglobin at the lung level?

Q. The rate of $C{O}_2$ diffusion is much higher compared to $O_2$. What could be the possible reason for the same?

1. Solubility of $O_2$ is higher than $C{O}_2$
2. Solubility of $C{O}_2$ is higher than $O_2$
3. $O_2$ is insoluble
4. It does not depend upon the solubility of the gases

Q.

Which animals blood is blue in color?

Q.

Choose the correct option-

A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This oxygen ___?

1. Raises the pCO2 of blood to 75 mm of Hg

2. Acts as a reserve during muscular exercise

3. Is enough to keep oxyhaemoglobin saturation at 96%

4. Helps in releasing more O2 to the epithelium tissues

Q.

What is the effect of $pC{O}_2$ on oxygen transport?

Q.

What animal has green blood?

Q.

Identify the wrong statement with reference to transport of oxygen.

1. Higher H⁺ conc. in alveoli favours the formation of oxyhaemoglobin

2. Low pCO₂ in alveoli favours the formation of oxyhaemoglobin

3. Binding of oxygen with haemoglobin is mainly related to partial pressure of O₂

4. Partial pressure of CO₂ can interfere with O₂ binding with haemoglobin

Q.

100 ml of blood contains 15 g of haemoglobin and each gram of haemoglobin combines with 1.34 ml of oxygen. What will be the volume of oxygen in the haemoglobin of arterial blood?

1. 19.4 ml

2. 20.1 ml

3. 14.4 ml

4. 15 ml

Q.

Mention the role of hemoglobin in respiration

Q. What is/ are the factor/ factors that affect the transportation of oxygen within the body?

1. Temperature
2. Hydrogen ion concentration
3. All the above
4. Partial pressure of oxygen and carbon dioxide

Q. How is oxygen and carbon dioxide transported in human body?

Q. Respiratory gases in our body are transported via ___________

1. RBC
2. Both a and c
3. plasma
4. WBC

Q. If four molecules of oxygen bind to haemoglobin then the compound oxyhaemoglobin formed can be represented as

1. $Hb{O}_6$
2. $Hb{O}_8$
3. $Hb{O}_2$
4. $Hb{O}_4$

Q. A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This oxygen

1. raises the p${CO}_2$ of blood to 75 mm of Hg
2. is enough to keep oxyhaemoglobin saturation at 96%
3. acts as a reserve during muscular exercise
4. helps in releasing more $O_2$

Q.

What are HbA2 and HbF?

Q.

Is all blood red?

Q.

Haemoglobin is found dissolved in the plasma of

1. Man

2. Earthworms

3. Frogs

4. Birds

Q. Reduction in pH of blood will:

1. Reduce the rate of heart beat
2. Reduce the blood supply to the brain
3. Decrease the affinity of hemoglobin with oxygen
4. Release bicarbonate ions by the liver

Q.

Where does haemoglobin release oxygen in the body?

Q. State whether true or false:
Haemoglobin has a higher affinity for oxygen than for carbon monoxide.

1. False
2. True

Q.

Veins contain _________valves.

Q.

The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the ________.

1. temperature is lower at higher altitudes

2. basal metabolic rate is higher at high altitudes

3. concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes

4. concentration of oxygen and/or total atmospheric pressure is lower at high altitudes

Q. Which of the following metal elements plays an important role in the transport of respiratory gases?

1. Zinc
2. Potassium
3. Calcium
4. Iron

Q. If haemoglobin is 75% saturated, then how many oxygen molecules are combined with haemoglobin?

1. 3
2. 2
3. 3/2
4. 1

Q. Which two of the following changes (I-IV) usually tend to occur in the plain dwellers, when they move to high altitudes (3500 m or more)?
I. Increase in red blood cell size.
II. Increase in red blood cell production.
III. Increased breathing rate.
IV. Increase in thrombocyte count.
Changes occurring are

1. II and III
2. III and IV
3. I and IV
4. I and II

Q. Which of the following statements regarding gases transportation is not correct?

1. Carbon dioxide reversibly binds to haemoglobin
2. Oxygen is transported by RBC and plasma .
3. All are correct.
4. Oxygen irreversibly binds to haemoglobin

Q.

The metal associated with haemoglobin is

1. Copper

2. Magnesium

3. Iron

4. Manganese

Q.

What are the signs and symptoms of impaired gas exchange?