278094
The movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ between the blood in the tissue capillaries and the cells in tissues depends most directly upon:
1 active transport of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$.
2 total atmospheric (barometric) pressure differences across the cell membranes.
3 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a concentration gradient.
4 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a partial pressure gradient.
Explanation:
(d) Movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ from the blood to the tissues always occurs by diffusion of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down their partial pressure gradients.
NCERT Page-272 & 273 / N-187
BREATHING and EXCHANGE OF GASES
278095
Which of the following lung volumes or capacities can be measured by spirometer:
1 Functional residual capacity (FRC)
2 Residual volume
3 Total lung capacity (TLC)
4 Vital capacity
Explanation:
(d) Vital capacity can be measured by spirometer.
NCERT ( Page-271 & 272 / N-186
BREATHING and EXCHANGE OF GASES
278096
The exchange of gases in the alveoli of the lungs takes place by:
1 Simple diffusion
2 Osmosis
3 Active transport
4 Passive transport
Explanation:
(a) Gaseous exchange between blood (dissolved phase) and alveolar air (gaseous phase) across respiratory membrane occurs by simple diffusion. Obviously, it depends upon the concentration gradient (= partial pressure) of the concerned gases in blood and alveolar air.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278097
In mammals, carbon dioxide is transported from tissues to respiratory surface by
1 plasma
2 R.B.C
3 W.B.C.
4 both (a) and (b)
Explanation:
(d) $\text{C}{{\text{O}}_{2}}$ is transported both by plasma and haemoglobin of blood.
278094
The movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ between the blood in the tissue capillaries and the cells in tissues depends most directly upon:
1 active transport of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$.
2 total atmospheric (barometric) pressure differences across the cell membranes.
3 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a concentration gradient.
4 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a partial pressure gradient.
Explanation:
(d) Movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ from the blood to the tissues always occurs by diffusion of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down their partial pressure gradients.
NCERT Page-272 & 273 / N-187
BREATHING and EXCHANGE OF GASES
278095
Which of the following lung volumes or capacities can be measured by spirometer:
1 Functional residual capacity (FRC)
2 Residual volume
3 Total lung capacity (TLC)
4 Vital capacity
Explanation:
(d) Vital capacity can be measured by spirometer.
NCERT ( Page-271 & 272 / N-186
BREATHING and EXCHANGE OF GASES
278096
The exchange of gases in the alveoli of the lungs takes place by:
1 Simple diffusion
2 Osmosis
3 Active transport
4 Passive transport
Explanation:
(a) Gaseous exchange between blood (dissolved phase) and alveolar air (gaseous phase) across respiratory membrane occurs by simple diffusion. Obviously, it depends upon the concentration gradient (= partial pressure) of the concerned gases in blood and alveolar air.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278097
In mammals, carbon dioxide is transported from tissues to respiratory surface by
1 plasma
2 R.B.C
3 W.B.C.
4 both (a) and (b)
Explanation:
(d) $\text{C}{{\text{O}}_{2}}$ is transported both by plasma and haemoglobin of blood.
278094
The movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ between the blood in the tissue capillaries and the cells in tissues depends most directly upon:
1 active transport of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$.
2 total atmospheric (barometric) pressure differences across the cell membranes.
3 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a concentration gradient.
4 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a partial pressure gradient.
Explanation:
(d) Movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ from the blood to the tissues always occurs by diffusion of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down their partial pressure gradients.
NCERT Page-272 & 273 / N-187
BREATHING and EXCHANGE OF GASES
278095
Which of the following lung volumes or capacities can be measured by spirometer:
1 Functional residual capacity (FRC)
2 Residual volume
3 Total lung capacity (TLC)
4 Vital capacity
Explanation:
(d) Vital capacity can be measured by spirometer.
NCERT ( Page-271 & 272 / N-186
BREATHING and EXCHANGE OF GASES
278096
The exchange of gases in the alveoli of the lungs takes place by:
1 Simple diffusion
2 Osmosis
3 Active transport
4 Passive transport
Explanation:
(a) Gaseous exchange between blood (dissolved phase) and alveolar air (gaseous phase) across respiratory membrane occurs by simple diffusion. Obviously, it depends upon the concentration gradient (= partial pressure) of the concerned gases in blood and alveolar air.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278097
In mammals, carbon dioxide is transported from tissues to respiratory surface by
1 plasma
2 R.B.C
3 W.B.C.
4 both (a) and (b)
Explanation:
(d) $\text{C}{{\text{O}}_{2}}$ is transported both by plasma and haemoglobin of blood.
278094
The movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ between the blood in the tissue capillaries and the cells in tissues depends most directly upon:
1 active transport of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$.
2 total atmospheric (barometric) pressure differences across the cell membranes.
3 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a concentration gradient.
4 diffusion of${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down a partial pressure gradient.
Explanation:
(d) Movement of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ from the blood to the tissues always occurs by diffusion of ${{\text{O}}_{2}}$ and $\text{C}{{\text{O}}_{2}}$ down their partial pressure gradients.
NCERT Page-272 & 273 / N-187
BREATHING and EXCHANGE OF GASES
278095
Which of the following lung volumes or capacities can be measured by spirometer:
1 Functional residual capacity (FRC)
2 Residual volume
3 Total lung capacity (TLC)
4 Vital capacity
Explanation:
(d) Vital capacity can be measured by spirometer.
NCERT ( Page-271 & 272 / N-186
BREATHING and EXCHANGE OF GASES
278096
The exchange of gases in the alveoli of the lungs takes place by:
1 Simple diffusion
2 Osmosis
3 Active transport
4 Passive transport
Explanation:
(a) Gaseous exchange between blood (dissolved phase) and alveolar air (gaseous phase) across respiratory membrane occurs by simple diffusion. Obviously, it depends upon the concentration gradient (= partial pressure) of the concerned gases in blood and alveolar air.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278097
In mammals, carbon dioxide is transported from tissues to respiratory surface by
1 plasma
2 R.B.C
3 W.B.C.
4 both (a) and (b)
Explanation:
(d) $\text{C}{{\text{O}}_{2}}$ is transported both by plasma and haemoglobin of blood.
