278080
Which of the following has no specialized respiratory structures?
1 crab
2 earthworm
3 salmon
4 ant
Explanation:
(b) Earthworms do not have a special respiratory organ. Exchange of gases takes place through their skin.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278081
The structure which prevents the entry of food into the windpipe is
1 gullet
2 glottis
3 tonsil
4 epiglottis
Explanation:
(d) Epiglottis is a stiff flap like structure covering the glottis. It acts as a trapdoor to the trachea and prevents the entry of food going down to lungs.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278082
Lungs are present in N
1 mediastinum
2 pleural cavity
3 pericardial cavity
4 thoracic cavity
Explanation:
(d) Lungs are conical in shape that take up most of the chest and thoracic cavity.
NCERT Page-269 & 270/ N-184
BREATHING and EXCHANGE OF GASES
278070
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
2 Partial pressure of$\text{C}{{\text{O}}_{2}}$
3 Union of${{\text{O}}_{2}}$ with haemoglobin
4 All of the above
Explanation:
(a) 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
278071
Functional residual capacity can be represented as
1 TV + ERV
2 ERV + RV
3 $RV+IRV$
4 $ERV+TV+IRV$
Explanation:
(b) Functional residual capacity is the volume of air remaining in the lungs after a normal expiration $\left( ERV+RV \right)$ : It is about $2100-2300\text{ml}$.
278080
Which of the following has no specialized respiratory structures?
1 crab
2 earthworm
3 salmon
4 ant
Explanation:
(b) Earthworms do not have a special respiratory organ. Exchange of gases takes place through their skin.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278081
The structure which prevents the entry of food into the windpipe is
1 gullet
2 glottis
3 tonsil
4 epiglottis
Explanation:
(d) Epiglottis is a stiff flap like structure covering the glottis. It acts as a trapdoor to the trachea and prevents the entry of food going down to lungs.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278082
Lungs are present in N
1 mediastinum
2 pleural cavity
3 pericardial cavity
4 thoracic cavity
Explanation:
(d) Lungs are conical in shape that take up most of the chest and thoracic cavity.
NCERT Page-269 & 270/ N-184
BREATHING and EXCHANGE OF GASES
278070
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
2 Partial pressure of$\text{C}{{\text{O}}_{2}}$
3 Union of${{\text{O}}_{2}}$ with haemoglobin
4 All of the above
Explanation:
(a) 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
278071
Functional residual capacity can be represented as
1 TV + ERV
2 ERV + RV
3 $RV+IRV$
4 $ERV+TV+IRV$
Explanation:
(b) Functional residual capacity is the volume of air remaining in the lungs after a normal expiration $\left( ERV+RV \right)$ : It is about $2100-2300\text{ml}$.
278080
Which of the following has no specialized respiratory structures?
1 crab
2 earthworm
3 salmon
4 ant
Explanation:
(b) Earthworms do not have a special respiratory organ. Exchange of gases takes place through their skin.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278081
The structure which prevents the entry of food into the windpipe is
1 gullet
2 glottis
3 tonsil
4 epiglottis
Explanation:
(d) Epiglottis is a stiff flap like structure covering the glottis. It acts as a trapdoor to the trachea and prevents the entry of food going down to lungs.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278082
Lungs are present in N
1 mediastinum
2 pleural cavity
3 pericardial cavity
4 thoracic cavity
Explanation:
(d) Lungs are conical in shape that take up most of the chest and thoracic cavity.
NCERT Page-269 & 270/ N-184
BREATHING and EXCHANGE OF GASES
278070
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
2 Partial pressure of$\text{C}{{\text{O}}_{2}}$
3 Union of${{\text{O}}_{2}}$ with haemoglobin
4 All of the above
Explanation:
(a) 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
278071
Functional residual capacity can be represented as
1 TV + ERV
2 ERV + RV
3 $RV+IRV$
4 $ERV+TV+IRV$
Explanation:
(b) Functional residual capacity is the volume of air remaining in the lungs after a normal expiration $\left( ERV+RV \right)$ : It is about $2100-2300\text{ml}$.
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BREATHING and EXCHANGE OF GASES
278080
Which of the following has no specialized respiratory structures?
1 crab
2 earthworm
3 salmon
4 ant
Explanation:
(b) Earthworms do not have a special respiratory organ. Exchange of gases takes place through their skin.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278081
The structure which prevents the entry of food into the windpipe is
1 gullet
2 glottis
3 tonsil
4 epiglottis
Explanation:
(d) Epiglottis is a stiff flap like structure covering the glottis. It acts as a trapdoor to the trachea and prevents the entry of food going down to lungs.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278082
Lungs are present in N
1 mediastinum
2 pleural cavity
3 pericardial cavity
4 thoracic cavity
Explanation:
(d) Lungs are conical in shape that take up most of the chest and thoracic cavity.
NCERT Page-269 & 270/ N-184
BREATHING and EXCHANGE OF GASES
278070
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
2 Partial pressure of$\text{C}{{\text{O}}_{2}}$
3 Union of${{\text{O}}_{2}}$ with haemoglobin
4 All of the above
Explanation:
(a) 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
278071
Functional residual capacity can be represented as
1 TV + ERV
2 ERV + RV
3 $RV+IRV$
4 $ERV+TV+IRV$
Explanation:
(b) Functional residual capacity is the volume of air remaining in the lungs after a normal expiration $\left( ERV+RV \right)$ : It is about $2100-2300\text{ml}$.
278080
Which of the following has no specialized respiratory structures?
1 crab
2 earthworm
3 salmon
4 ant
Explanation:
(b) Earthworms do not have a special respiratory organ. Exchange of gases takes place through their skin.
NCERT Page-268 / N-183
BREATHING and EXCHANGE OF GASES
278081
The structure which prevents the entry of food into the windpipe is
1 gullet
2 glottis
3 tonsil
4 epiglottis
Explanation:
(d) Epiglottis is a stiff flap like structure covering the glottis. It acts as a trapdoor to the trachea and prevents the entry of food going down to lungs.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278082
Lungs are present in N
1 mediastinum
2 pleural cavity
3 pericardial cavity
4 thoracic cavity
Explanation:
(d) Lungs are conical in shape that take up most of the chest and thoracic cavity.
NCERT Page-269 & 270/ N-184
BREATHING and EXCHANGE OF GASES
278070
What is the cause for the movement of oxygen through the alveolar blood capillaries of lungs?
1 Difference in the${{\text{O}}_{2}}$ tension and partial pressure of these chambers
2 Partial pressure of$\text{C}{{\text{O}}_{2}}$
3 Union of${{\text{O}}_{2}}$ with haemoglobin
4 All of the above
Explanation:
(a) 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
278071
Functional residual capacity can be represented as
1 TV + ERV
2 ERV + RV
3 $RV+IRV$
4 $ERV+TV+IRV$
Explanation:
(b) Functional residual capacity is the volume of air remaining in the lungs after a normal expiration $\left( ERV+RV \right)$ : It is about $2100-2300\text{ml}$.