278112
Although much $\text{C}{{\text{O}}_{2}}$ is carried in blood, yet blood does not become acidic, because:
1 it is absorbed by the leucocytes.
2 blood buffers play an important role in$\text{C}{{\text{O}}_{2}}$ transport.
3 it combines with water to form$\text{H}2\text{CO}$ which is neutralised by $\text{N}{{\text{a}}_{2}}\text{C}{{\text{O}}_{3}}$.
4 it is continuously diffused through tissues and is not allowed to accumulate.
Explanation:
(b) $\text{C}{{\text{O}}_{2}}$ enters $\text{RBC}$ and reacts with water to form carbonic acid. Carbonic acid dissociates to form bicarbonate and hydrogen ions. Some bicarbonate ions are transported in erythrocytes while some diffuse into the blood plasma. Exit of bicarbonate ions changes the ionic balance, between the plasma and erythrocytes. To restore this balance, chloride ions diffuse from plasma into erythrocytes. Due to this, the $\text{pH}$ of blood is maintained.
NCERT (Page-275 / N-190
BREATHING and EXCHANGE OF GASES
278113
What would happen if human blood becomes acidic (low pH)?
1 Oxygen carying capacity of haemoglobin increases.
2 Oxygen carrying capacity of haemoglobin decreases.
3 RBCs count increases.
4 RBCs count decreases
Explanation:
(b) If human blood becomes acidic, oxygen carrying capacity of haemoglobin decreases.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278114
Carbon dioxide is transported from tissues to respiratory surface by:
1 Plasma and erythrocytes
2 Plasma
3 Erythrocytes
4 Erythrocytes and leucocytes
Explanation:
(a) $\text{C}{{\text{O}}_{2}}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways :
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278115
Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by
1 increasing$\text{C}{{\text{O}}_{2}}$ concentration in blood.
2 increasing${{\text{O}}_{2}}$ concentration in blood.
3 decreasing${{\text{O}}_{2}}$ concentration in blood.
4 introducing$\text{CO}$ into blood.
Explanation:
(b) Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by increasing ${{\text{O}}_{2}}$ concentration in blood.
278112
Although much $\text{C}{{\text{O}}_{2}}$ is carried in blood, yet blood does not become acidic, because:
1 it is absorbed by the leucocytes.
2 blood buffers play an important role in$\text{C}{{\text{O}}_{2}}$ transport.
3 it combines with water to form$\text{H}2\text{CO}$ which is neutralised by $\text{N}{{\text{a}}_{2}}\text{C}{{\text{O}}_{3}}$.
4 it is continuously diffused through tissues and is not allowed to accumulate.
Explanation:
(b) $\text{C}{{\text{O}}_{2}}$ enters $\text{RBC}$ and reacts with water to form carbonic acid. Carbonic acid dissociates to form bicarbonate and hydrogen ions. Some bicarbonate ions are transported in erythrocytes while some diffuse into the blood plasma. Exit of bicarbonate ions changes the ionic balance, between the plasma and erythrocytes. To restore this balance, chloride ions diffuse from plasma into erythrocytes. Due to this, the $\text{pH}$ of blood is maintained.
NCERT (Page-275 / N-190
BREATHING and EXCHANGE OF GASES
278113
What would happen if human blood becomes acidic (low pH)?
1 Oxygen carying capacity of haemoglobin increases.
2 Oxygen carrying capacity of haemoglobin decreases.
3 RBCs count increases.
4 RBCs count decreases
Explanation:
(b) If human blood becomes acidic, oxygen carrying capacity of haemoglobin decreases.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278114
Carbon dioxide is transported from tissues to respiratory surface by:
1 Plasma and erythrocytes
2 Plasma
3 Erythrocytes
4 Erythrocytes and leucocytes
Explanation:
(a) $\text{C}{{\text{O}}_{2}}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways :
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278115
Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by
1 increasing$\text{C}{{\text{O}}_{2}}$ concentration in blood.
2 increasing${{\text{O}}_{2}}$ concentration in blood.
3 decreasing${{\text{O}}_{2}}$ concentration in blood.
4 introducing$\text{CO}$ into blood.
Explanation:
(b) Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by increasing ${{\text{O}}_{2}}$ concentration in blood.
278112
Although much $\text{C}{{\text{O}}_{2}}$ is carried in blood, yet blood does not become acidic, because:
1 it is absorbed by the leucocytes.
2 blood buffers play an important role in$\text{C}{{\text{O}}_{2}}$ transport.
3 it combines with water to form$\text{H}2\text{CO}$ which is neutralised by $\text{N}{{\text{a}}_{2}}\text{C}{{\text{O}}_{3}}$.
4 it is continuously diffused through tissues and is not allowed to accumulate.
Explanation:
(b) $\text{C}{{\text{O}}_{2}}$ enters $\text{RBC}$ and reacts with water to form carbonic acid. Carbonic acid dissociates to form bicarbonate and hydrogen ions. Some bicarbonate ions are transported in erythrocytes while some diffuse into the blood plasma. Exit of bicarbonate ions changes the ionic balance, between the plasma and erythrocytes. To restore this balance, chloride ions diffuse from plasma into erythrocytes. Due to this, the $\text{pH}$ of blood is maintained.
NCERT (Page-275 / N-190
BREATHING and EXCHANGE OF GASES
278113
What would happen if human blood becomes acidic (low pH)?
1 Oxygen carying capacity of haemoglobin increases.
2 Oxygen carrying capacity of haemoglobin decreases.
3 RBCs count increases.
4 RBCs count decreases
Explanation:
(b) If human blood becomes acidic, oxygen carrying capacity of haemoglobin decreases.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278114
Carbon dioxide is transported from tissues to respiratory surface by:
1 Plasma and erythrocytes
2 Plasma
3 Erythrocytes
4 Erythrocytes and leucocytes
Explanation:
(a) $\text{C}{{\text{O}}_{2}}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways :
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278115
Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by
1 increasing$\text{C}{{\text{O}}_{2}}$ concentration in blood.
2 increasing${{\text{O}}_{2}}$ concentration in blood.
3 decreasing${{\text{O}}_{2}}$ concentration in blood.
4 introducing$\text{CO}$ into blood.
Explanation:
(b) Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by increasing ${{\text{O}}_{2}}$ concentration in blood.
278112
Although much $\text{C}{{\text{O}}_{2}}$ is carried in blood, yet blood does not become acidic, because:
1 it is absorbed by the leucocytes.
2 blood buffers play an important role in$\text{C}{{\text{O}}_{2}}$ transport.
3 it combines with water to form$\text{H}2\text{CO}$ which is neutralised by $\text{N}{{\text{a}}_{2}}\text{C}{{\text{O}}_{3}}$.
4 it is continuously diffused through tissues and is not allowed to accumulate.
Explanation:
(b) $\text{C}{{\text{O}}_{2}}$ enters $\text{RBC}$ and reacts with water to form carbonic acid. Carbonic acid dissociates to form bicarbonate and hydrogen ions. Some bicarbonate ions are transported in erythrocytes while some diffuse into the blood plasma. Exit of bicarbonate ions changes the ionic balance, between the plasma and erythrocytes. To restore this balance, chloride ions diffuse from plasma into erythrocytes. Due to this, the $\text{pH}$ of blood is maintained.
NCERT (Page-275 / N-190
BREATHING and EXCHANGE OF GASES
278113
What would happen if human blood becomes acidic (low pH)?
1 Oxygen carying capacity of haemoglobin increases.
2 Oxygen carrying capacity of haemoglobin decreases.
3 RBCs count increases.
4 RBCs count decreases
Explanation:
(b) If human blood becomes acidic, oxygen carrying capacity of haemoglobin decreases.
NCERT Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278114
Carbon dioxide is transported from tissues to respiratory surface by:
1 Plasma and erythrocytes
2 Plasma
3 Erythrocytes
4 Erythrocytes and leucocytes
Explanation:
(a) $\text{C}{{\text{O}}_{2}}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways :
NCERT (Page-274 / N-189
BREATHING and EXCHANGE OF GASES
278115
Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by
1 increasing$\text{C}{{\text{O}}_{2}}$ concentration in blood.
2 increasing${{\text{O}}_{2}}$ concentration in blood.
3 decreasing${{\text{O}}_{2}}$ concentration in blood.
4 introducing$\text{CO}$ into blood.
Explanation:
(b) Combining of haemoglobin with ${{\text{O}}_{2}}$ in lungs can be promoted by increasing ${{\text{O}}_{2}}$ concentration in blood.
