278116
About $70\text{ }\!\!%\!\!\text{ }$ of $\text{C}{{\text{O}}_{2}}$ is transported as
1 carbonic acid
2 darboxyhaemoglobin
3 bicarbonates
4 carbamino compounds
Explanation:
(c) About $70\text{ }\!\!%\!\!\text{ }$ of carbon dioxide is transported as sodium bicarbonate.
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278117
Oxyhaemoglobin dissociates into oxygen and deoxyhaemoglobin at
1 low${{\text{O}}_{2}}$ pressure in tissue.
2 high${{\text{O}}_{2}}$ pressure in tissue.
3 equal${{\text{O}}_{2}}$ pressure inside and outside tissue.
4 all times irrespective of${{\text{O}}_{2}}$ pressure.
Explanation:
(a) Oxyhaemoglobin is the bright red haemoglobin which is a formed by the combination of haemoglobin and oxygen from the lungs. Oxyhaemoglobin transports oxygen to the cells of the body. It dissociates into oxygen and deoxyhaemoglobin at low ${{\text{O}}_{2}}$ pressure in tissue.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278118
If ${{\text{O}}_{2}}$ concentration in tissues were almost as high as at the respiratory surface: $\text{ }\!\!~\!\!\text{ }$
1 oxyhaemoglobin would dissociate to supply${{\text{O}}_{2}}$ to the tissues.
2 haemoglobin would combine with more${{\text{O}}_{2}}$ to the tissues.
3 oxyhaemoglobin would not dissociate to supply${{\text{O}}_{2}}$ to the tissues.
4 $\text{C}{{\text{O}}_{2}}$ will interfere with ${{\text{O}}_{2}}$ transport.
Explanation:
(c) Oxyhaemoglobin would not dissociate to supply ${{\text{O}}_{2}}$ to the tissues.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278119
Which fact suggests that most ${{\text{O}}_{2}}$ is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?
1 ${{\text{O}}_{2}}$-carrying capacity of whole blood is much higher than that of plasma and ${{\text{O}}_{2}}$ content of blood leaving the lungs is greater than that of blood entering the lungs.
2 haemoglobin can combine with${{\text{O}}_{2}}$.
3 oxyhaemoglobin can dissociate into haemoglobin and${{\text{O}}_{2}}$.
4 increase in$\text{C}{{\text{O}}_{2}}$ concentration decreases the ${{\text{O}}_{2}}$ affinity of haemoglobin.
278116
About $70\text{ }\!\!%\!\!\text{ }$ of $\text{C}{{\text{O}}_{2}}$ is transported as
1 carbonic acid
2 darboxyhaemoglobin
3 bicarbonates
4 carbamino compounds
Explanation:
(c) About $70\text{ }\!\!%\!\!\text{ }$ of carbon dioxide is transported as sodium bicarbonate.
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278117
Oxyhaemoglobin dissociates into oxygen and deoxyhaemoglobin at
1 low${{\text{O}}_{2}}$ pressure in tissue.
2 high${{\text{O}}_{2}}$ pressure in tissue.
3 equal${{\text{O}}_{2}}$ pressure inside and outside tissue.
4 all times irrespective of${{\text{O}}_{2}}$ pressure.
Explanation:
(a) Oxyhaemoglobin is the bright red haemoglobin which is a formed by the combination of haemoglobin and oxygen from the lungs. Oxyhaemoglobin transports oxygen to the cells of the body. It dissociates into oxygen and deoxyhaemoglobin at low ${{\text{O}}_{2}}$ pressure in tissue.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278118
If ${{\text{O}}_{2}}$ concentration in tissues were almost as high as at the respiratory surface: $\text{ }\!\!~\!\!\text{ }$
1 oxyhaemoglobin would dissociate to supply${{\text{O}}_{2}}$ to the tissues.
2 haemoglobin would combine with more${{\text{O}}_{2}}$ to the tissues.
3 oxyhaemoglobin would not dissociate to supply${{\text{O}}_{2}}$ to the tissues.
4 $\text{C}{{\text{O}}_{2}}$ will interfere with ${{\text{O}}_{2}}$ transport.
Explanation:
(c) Oxyhaemoglobin would not dissociate to supply ${{\text{O}}_{2}}$ to the tissues.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278119
Which fact suggests that most ${{\text{O}}_{2}}$ is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?
1 ${{\text{O}}_{2}}$-carrying capacity of whole blood is much higher than that of plasma and ${{\text{O}}_{2}}$ content of blood leaving the lungs is greater than that of blood entering the lungs.
2 haemoglobin can combine with${{\text{O}}_{2}}$.
3 oxyhaemoglobin can dissociate into haemoglobin and${{\text{O}}_{2}}$.
4 increase in$\text{C}{{\text{O}}_{2}}$ concentration decreases the ${{\text{O}}_{2}}$ affinity of haemoglobin.
278116
About $70\text{ }\!\!%\!\!\text{ }$ of $\text{C}{{\text{O}}_{2}}$ is transported as
1 carbonic acid
2 darboxyhaemoglobin
3 bicarbonates
4 carbamino compounds
Explanation:
(c) About $70\text{ }\!\!%\!\!\text{ }$ of carbon dioxide is transported as sodium bicarbonate.
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278117
Oxyhaemoglobin dissociates into oxygen and deoxyhaemoglobin at
1 low${{\text{O}}_{2}}$ pressure in tissue.
2 high${{\text{O}}_{2}}$ pressure in tissue.
3 equal${{\text{O}}_{2}}$ pressure inside and outside tissue.
4 all times irrespective of${{\text{O}}_{2}}$ pressure.
Explanation:
(a) Oxyhaemoglobin is the bright red haemoglobin which is a formed by the combination of haemoglobin and oxygen from the lungs. Oxyhaemoglobin transports oxygen to the cells of the body. It dissociates into oxygen and deoxyhaemoglobin at low ${{\text{O}}_{2}}$ pressure in tissue.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278118
If ${{\text{O}}_{2}}$ concentration in tissues were almost as high as at the respiratory surface: $\text{ }\!\!~\!\!\text{ }$
1 oxyhaemoglobin would dissociate to supply${{\text{O}}_{2}}$ to the tissues.
2 haemoglobin would combine with more${{\text{O}}_{2}}$ to the tissues.
3 oxyhaemoglobin would not dissociate to supply${{\text{O}}_{2}}$ to the tissues.
4 $\text{C}{{\text{O}}_{2}}$ will interfere with ${{\text{O}}_{2}}$ transport.
Explanation:
(c) Oxyhaemoglobin would not dissociate to supply ${{\text{O}}_{2}}$ to the tissues.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278119
Which fact suggests that most ${{\text{O}}_{2}}$ is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?
1 ${{\text{O}}_{2}}$-carrying capacity of whole blood is much higher than that of plasma and ${{\text{O}}_{2}}$ content of blood leaving the lungs is greater than that of blood entering the lungs.
2 haemoglobin can combine with${{\text{O}}_{2}}$.
3 oxyhaemoglobin can dissociate into haemoglobin and${{\text{O}}_{2}}$.
4 increase in$\text{C}{{\text{O}}_{2}}$ concentration decreases the ${{\text{O}}_{2}}$ affinity of haemoglobin.
278116
About $70\text{ }\!\!%\!\!\text{ }$ of $\text{C}{{\text{O}}_{2}}$ is transported as
1 carbonic acid
2 darboxyhaemoglobin
3 bicarbonates
4 carbamino compounds
Explanation:
(c) About $70\text{ }\!\!%\!\!\text{ }$ of carbon dioxide is transported as sodium bicarbonate.
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278117
Oxyhaemoglobin dissociates into oxygen and deoxyhaemoglobin at
1 low${{\text{O}}_{2}}$ pressure in tissue.
2 high${{\text{O}}_{2}}$ pressure in tissue.
3 equal${{\text{O}}_{2}}$ pressure inside and outside tissue.
4 all times irrespective of${{\text{O}}_{2}}$ pressure.
Explanation:
(a) Oxyhaemoglobin is the bright red haemoglobin which is a formed by the combination of haemoglobin and oxygen from the lungs. Oxyhaemoglobin transports oxygen to the cells of the body. It dissociates into oxygen and deoxyhaemoglobin at low ${{\text{O}}_{2}}$ pressure in tissue.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278118
If ${{\text{O}}_{2}}$ concentration in tissues were almost as high as at the respiratory surface: $\text{ }\!\!~\!\!\text{ }$
1 oxyhaemoglobin would dissociate to supply${{\text{O}}_{2}}$ to the tissues.
2 haemoglobin would combine with more${{\text{O}}_{2}}$ to the tissues.
3 oxyhaemoglobin would not dissociate to supply${{\text{O}}_{2}}$ to the tissues.
4 $\text{C}{{\text{O}}_{2}}$ will interfere with ${{\text{O}}_{2}}$ transport.
Explanation:
(c) Oxyhaemoglobin would not dissociate to supply ${{\text{O}}_{2}}$ to the tissues.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278119
Which fact suggests that most ${{\text{O}}_{2}}$ is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma?
1 ${{\text{O}}_{2}}$-carrying capacity of whole blood is much higher than that of plasma and ${{\text{O}}_{2}}$ content of blood leaving the lungs is greater than that of blood entering the lungs.
2 haemoglobin can combine with${{\text{O}}_{2}}$.
3 oxyhaemoglobin can dissociate into haemoglobin and${{\text{O}}_{2}}$.
4 increase in$\text{C}{{\text{O}}_{2}}$ concentration decreases the ${{\text{O}}_{2}}$ affinity of haemoglobin.
