Transport of Oxygen

Q.

How does oxygen travel in the blood?

Q.

What is the direction of movement of water molecules in simple diffusion?

Q.

Oxygen is mainly transported by

1. blood plasma

2. RBCs

3. Blood platelets

4. WBCs

Q.

Which Cells Are Responsible for Transportation of Oxygen?

Q. How many molecules of oxygen can bind to a molecule of haemoglobin?

1. One
2. Two
3. Three
4. Four

Q. Partial pressure of oxygen in the alveoli of the lungs is

1. less than that in the blood
2. less than that of carbon dioxide
3. equal to that in the blood
4. more than that in the blood

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

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

Q.

When there is low tension of oxygen, oxyhaemoglobin rapidly______

1. fades

2. dissociates

3. multiplies

4. balances

Q. The $p{O}_2$ of blood is directly proportional to the amount of dissolved oxygen.

1. False
2. True

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. Haldane effect plays a more important role in promoting carbon dioxide transport than that of the Bohr's effect in promoting oxygen transport because

1. Oxyhemoglobin is a stronger acid which donates hydrogen ion (H+) which in turn displace carbon dioxide from blood
2. Carbaminohaemoglobin is a stronger acid which splits into hydrogen ion (H+) and bicarbonate ($HC{O}_3^{-}$)
3. Carbon dioxide is less soluble in venous blood than in arterial blood.
4. Carbon dioxide reacts with water to form carbonic acid that lowers the pH in tissue

Q.

Where is carbonic anhydrase is found? Write its function.

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. The oxygen bound to haemoglobin contributes to blood pO2.

1. True
2. False

Q.

_________ is a disorder/disease related with the bubbling of N₂ in the blood resulting in pain or severe problem.

1. Cheyne-Stokes respiration

2. Hypopnea

3. Asthma

4. Caisson's disease

Q. Haldane effect is a phenomenon related to which of the following?

1. Binding of carbon dioxide with hemoglobin
2. Binding of carbon monoxide with hemoglobin
3. Binding of oxygen with hemoglobin
4. Binding of oxygen with tissues

Q. If a man inhales a mixture of gases containing oxygen, carbon monoxide, and carbon dioxide, he suffers from suffocation because

1. Carbon monoxide has a relatively higher affinity for haemoglobin and binds with it irreversibly
2. Carbon dioxide and carbon monoxide react, producing a poisonous gas
3. Haemoglobin molecules become saturated with these gases and hence, transport of oxygen slows down
4. These gases decrease the pH of the blood and cause breathing disturbance

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

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

Q. The haemoglobin of a human foetus

1. has only 2 protein subunits instead of 4
2. has a higher affinity for oxygen than that of an adult
3. has a lower affinity for oxygen than that of the adult
4. its affinity for oxygen is the same as that of an adult

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

Q.

Most of the oxygen in the blood is found in the _____.

1. Plasma

2. Haemoglobin

3. Iron

4. Capillaries

Q. People who have migrated from the planes to an area adjoining Rohtang Pass about six months back

1. Suffer from altitude sickness with symptoms like nausea, fatigue, etc.
2. Have the usual RBC count but their haemoglobin has very high binding affinity to oxygen
3. Have more RBCs and their haemoglobin has a lower binding affinity to oxygen
4. Are not physically fit to play games like football

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