278089
External gills, tracheae, and lungs all share which of the following sets of characteristics?
1 Part of gas-exchange system, exchange both$\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$; increase surface area for diffusion.
2 Used by water breathers; based on countercurrent exchange; use negative pressure breathing.
3 Exchange only${{\text{O}}_{2}}$; are associated with a circulatory system; found in vertebrates.
4 Found in insects; employ positive-pressure pumping based on crosscurrent flow.
Explanation:
(a) The external gill, tracheae, and lungs are all examples of gas-exchange systems used by various animals to exchange both $\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$. One of the special properties of all respiratory systems is that they increase surface area for diffusion.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278090
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Concentration of$\text{S}{{\text{O}}_{2}}$
2 Union of${{\text{O}}_{2}}$ with haemoglobin
3 Partial pressure of$\text{C}{{\text{O}}_{2}}$
4 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
Explanation:
(d) Difference in the ${{\text{O}}_{2}}$ tension and Partial pressure of these chambers causes the movement of oxygen through the alveolar blood capillaries of lungs. Tiny blood vessels are seen around the Alveoli which is known as Capillaries. The oxygen which is inhaled moves from the alveoli goes to the blood in the Capillaries.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278091
Membrane separating air in pulmonary alveoli from blood capillaries is
1 alveolar epithelium
2 cardiac epithelium
3 endothelium of blood capillaries
4 both (a) and (c)
Explanation:
(d) Alveolar epithelium and endothelium of blood capillaries are two membranes which separate air in pulmonary alveoli from blood capillaries.
NCERT Page-273 / N-188
BREATHING and EXCHANGE OF GASES
278092
Select the correct option regarding $\text{C}{{\text{O}}_{2}}$ concentration.
1 It is higher in alveolar air than in deoxygenated blood.
2 It is higher in oxygenated blood than in alveolar air.
3 It is higher in deoxygenated blood than in alveolar air.
4 It is higher in inspired air than in oxygenated blood.
Explanation:
(c) Partial pressure of $\text{C}{{\text{O}}_{2}}$ in alveolar air is $40\text{mmHg}$, that in deoxygenated blood is $45\text{mmHg}$ and that in oxygenated blood is $40\text{mmHg}$.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278093
Which of the following would have the same ${{\text{O}}_{2}}$ content? $\text{ }\!\!~\!\!\text{ }$
1 Blood entering the lungs and blood leaving the lungs
2 Blood entering the right side of the heart and blood leaving the right side of the heart
3 Blood entering the right side of the heart and blood leaving the left side of the heart
4 Blood entering the tissue capillaries and blood leaving the tissue capillaries
Explanation:
(b) Blood entering the right side of the heart and blood leaving the right side of the heart.
278089
External gills, tracheae, and lungs all share which of the following sets of characteristics?
1 Part of gas-exchange system, exchange both$\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$; increase surface area for diffusion.
2 Used by water breathers; based on countercurrent exchange; use negative pressure breathing.
3 Exchange only${{\text{O}}_{2}}$; are associated with a circulatory system; found in vertebrates.
4 Found in insects; employ positive-pressure pumping based on crosscurrent flow.
Explanation:
(a) The external gill, tracheae, and lungs are all examples of gas-exchange systems used by various animals to exchange both $\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$. One of the special properties of all respiratory systems is that they increase surface area for diffusion.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278090
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Concentration of$\text{S}{{\text{O}}_{2}}$
2 Union of${{\text{O}}_{2}}$ with haemoglobin
3 Partial pressure of$\text{C}{{\text{O}}_{2}}$
4 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
Explanation:
(d) Difference in the ${{\text{O}}_{2}}$ tension and Partial pressure of these chambers causes the movement of oxygen through the alveolar blood capillaries of lungs. Tiny blood vessels are seen around the Alveoli which is known as Capillaries. The oxygen which is inhaled moves from the alveoli goes to the blood in the Capillaries.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278091
Membrane separating air in pulmonary alveoli from blood capillaries is
1 alveolar epithelium
2 cardiac epithelium
3 endothelium of blood capillaries
4 both (a) and (c)
Explanation:
(d) Alveolar epithelium and endothelium of blood capillaries are two membranes which separate air in pulmonary alveoli from blood capillaries.
NCERT Page-273 / N-188
BREATHING and EXCHANGE OF GASES
278092
Select the correct option regarding $\text{C}{{\text{O}}_{2}}$ concentration.
1 It is higher in alveolar air than in deoxygenated blood.
2 It is higher in oxygenated blood than in alveolar air.
3 It is higher in deoxygenated blood than in alveolar air.
4 It is higher in inspired air than in oxygenated blood.
Explanation:
(c) Partial pressure of $\text{C}{{\text{O}}_{2}}$ in alveolar air is $40\text{mmHg}$, that in deoxygenated blood is $45\text{mmHg}$ and that in oxygenated blood is $40\text{mmHg}$.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278093
Which of the following would have the same ${{\text{O}}_{2}}$ content? $\text{ }\!\!~\!\!\text{ }$
1 Blood entering the lungs and blood leaving the lungs
2 Blood entering the right side of the heart and blood leaving the right side of the heart
3 Blood entering the right side of the heart and blood leaving the left side of the heart
4 Blood entering the tissue capillaries and blood leaving the tissue capillaries
Explanation:
(b) Blood entering the right side of the heart and blood leaving the right side of the heart.
278089
External gills, tracheae, and lungs all share which of the following sets of characteristics?
1 Part of gas-exchange system, exchange both$\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$; increase surface area for diffusion.
2 Used by water breathers; based on countercurrent exchange; use negative pressure breathing.
3 Exchange only${{\text{O}}_{2}}$; are associated with a circulatory system; found in vertebrates.
4 Found in insects; employ positive-pressure pumping based on crosscurrent flow.
Explanation:
(a) The external gill, tracheae, and lungs are all examples of gas-exchange systems used by various animals to exchange both $\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$. One of the special properties of all respiratory systems is that they increase surface area for diffusion.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278090
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Concentration of$\text{S}{{\text{O}}_{2}}$
2 Union of${{\text{O}}_{2}}$ with haemoglobin
3 Partial pressure of$\text{C}{{\text{O}}_{2}}$
4 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
Explanation:
(d) Difference in the ${{\text{O}}_{2}}$ tension and Partial pressure of these chambers causes the movement of oxygen through the alveolar blood capillaries of lungs. Tiny blood vessels are seen around the Alveoli which is known as Capillaries. The oxygen which is inhaled moves from the alveoli goes to the blood in the Capillaries.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278091
Membrane separating air in pulmonary alveoli from blood capillaries is
1 alveolar epithelium
2 cardiac epithelium
3 endothelium of blood capillaries
4 both (a) and (c)
Explanation:
(d) Alveolar epithelium and endothelium of blood capillaries are two membranes which separate air in pulmonary alveoli from blood capillaries.
NCERT Page-273 / N-188
BREATHING and EXCHANGE OF GASES
278092
Select the correct option regarding $\text{C}{{\text{O}}_{2}}$ concentration.
1 It is higher in alveolar air than in deoxygenated blood.
2 It is higher in oxygenated blood than in alveolar air.
3 It is higher in deoxygenated blood than in alveolar air.
4 It is higher in inspired air than in oxygenated blood.
Explanation:
(c) Partial pressure of $\text{C}{{\text{O}}_{2}}$ in alveolar air is $40\text{mmHg}$, that in deoxygenated blood is $45\text{mmHg}$ and that in oxygenated blood is $40\text{mmHg}$.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278093
Which of the following would have the same ${{\text{O}}_{2}}$ content? $\text{ }\!\!~\!\!\text{ }$
1 Blood entering the lungs and blood leaving the lungs
2 Blood entering the right side of the heart and blood leaving the right side of the heart
3 Blood entering the right side of the heart and blood leaving the left side of the heart
4 Blood entering the tissue capillaries and blood leaving the tissue capillaries
Explanation:
(b) Blood entering the right side of the heart and blood leaving the right side of the heart.
278089
External gills, tracheae, and lungs all share which of the following sets of characteristics?
1 Part of gas-exchange system, exchange both$\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$; increase surface area for diffusion.
2 Used by water breathers; based on countercurrent exchange; use negative pressure breathing.
3 Exchange only${{\text{O}}_{2}}$; are associated with a circulatory system; found in vertebrates.
4 Found in insects; employ positive-pressure pumping based on crosscurrent flow.
Explanation:
(a) The external gill, tracheae, and lungs are all examples of gas-exchange systems used by various animals to exchange both $\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$. One of the special properties of all respiratory systems is that they increase surface area for diffusion.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278090
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Concentration of$\text{S}{{\text{O}}_{2}}$
2 Union of${{\text{O}}_{2}}$ with haemoglobin
3 Partial pressure of$\text{C}{{\text{O}}_{2}}$
4 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
Explanation:
(d) Difference in the ${{\text{O}}_{2}}$ tension and Partial pressure of these chambers causes the movement of oxygen through the alveolar blood capillaries of lungs. Tiny blood vessels are seen around the Alveoli which is known as Capillaries. The oxygen which is inhaled moves from the alveoli goes to the blood in the Capillaries.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278091
Membrane separating air in pulmonary alveoli from blood capillaries is
1 alveolar epithelium
2 cardiac epithelium
3 endothelium of blood capillaries
4 both (a) and (c)
Explanation:
(d) Alveolar epithelium and endothelium of blood capillaries are two membranes which separate air in pulmonary alveoli from blood capillaries.
NCERT Page-273 / N-188
BREATHING and EXCHANGE OF GASES
278092
Select the correct option regarding $\text{C}{{\text{O}}_{2}}$ concentration.
1 It is higher in alveolar air than in deoxygenated blood.
2 It is higher in oxygenated blood than in alveolar air.
3 It is higher in deoxygenated blood than in alveolar air.
4 It is higher in inspired air than in oxygenated blood.
Explanation:
(c) Partial pressure of $\text{C}{{\text{O}}_{2}}$ in alveolar air is $40\text{mmHg}$, that in deoxygenated blood is $45\text{mmHg}$ and that in oxygenated blood is $40\text{mmHg}$.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278093
Which of the following would have the same ${{\text{O}}_{2}}$ content? $\text{ }\!\!~\!\!\text{ }$
1 Blood entering the lungs and blood leaving the lungs
2 Blood entering the right side of the heart and blood leaving the right side of the heart
3 Blood entering the right side of the heart and blood leaving the left side of the heart
4 Blood entering the tissue capillaries and blood leaving the tissue capillaries
Explanation:
(b) Blood entering the right side of the heart and blood leaving the right side of the heart.
278089
External gills, tracheae, and lungs all share which of the following sets of characteristics?
1 Part of gas-exchange system, exchange both$\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$; increase surface area for diffusion.
2 Used by water breathers; based on countercurrent exchange; use negative pressure breathing.
3 Exchange only${{\text{O}}_{2}}$; are associated with a circulatory system; found in vertebrates.
4 Found in insects; employ positive-pressure pumping based on crosscurrent flow.
Explanation:
(a) The external gill, tracheae, and lungs are all examples of gas-exchange systems used by various animals to exchange both $\text{C}{{\text{O}}_{2}}$ and ${{\text{O}}_{2}}$. One of the special properties of all respiratory systems is that they increase surface area for diffusion.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278090
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Concentration of$\text{S}{{\text{O}}_{2}}$
2 Union of${{\text{O}}_{2}}$ with haemoglobin
3 Partial pressure of$\text{C}{{\text{O}}_{2}}$
4 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
Explanation:
(d) Difference in the ${{\text{O}}_{2}}$ tension and Partial pressure of these chambers causes the movement of oxygen through the alveolar blood capillaries of lungs. Tiny blood vessels are seen around the Alveoli which is known as Capillaries. The oxygen which is inhaled moves from the alveoli goes to the blood in the Capillaries.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278091
Membrane separating air in pulmonary alveoli from blood capillaries is
1 alveolar epithelium
2 cardiac epithelium
3 endothelium of blood capillaries
4 both (a) and (c)
Explanation:
(d) Alveolar epithelium and endothelium of blood capillaries are two membranes which separate air in pulmonary alveoli from blood capillaries.
NCERT Page-273 / N-188
BREATHING and EXCHANGE OF GASES
278092
Select the correct option regarding $\text{C}{{\text{O}}_{2}}$ concentration.
1 It is higher in alveolar air than in deoxygenated blood.
2 It is higher in oxygenated blood than in alveolar air.
3 It is higher in deoxygenated blood than in alveolar air.
4 It is higher in inspired air than in oxygenated blood.
Explanation:
(c) Partial pressure of $\text{C}{{\text{O}}_{2}}$ in alveolar air is $40\text{mmHg}$, that in deoxygenated blood is $45\text{mmHg}$ and that in oxygenated blood is $40\text{mmHg}$.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278093
Which of the following would have the same ${{\text{O}}_{2}}$ content? $\text{ }\!\!~\!\!\text{ }$
1 Blood entering the lungs and blood leaving the lungs
2 Blood entering the right side of the heart and blood leaving the right side of the heart
3 Blood entering the right side of the heart and blood leaving the left side of the heart
4 Blood entering the tissue capillaries and blood leaving the tissue capillaries
Explanation:
(b) Blood entering the right side of the heart and blood leaving the right side of the heart.
