278058
The smallest and thinnest tube in the lung is
1 trachea
2 Layno
3 bronchi
4 bronchiole
Explanation:
(d)
NCERT Page-269/ N-184$
BREATHING and EXCHANGE OF GASES
278059
Even when there is no air in it, human trachea does not collapse due to presence of
1 bony rings
2 turgid pressure
3 chitinous rings
4 cartilaginous rings
Explanation:
(d) Trachea is a membranous tube supported by " $C$ " shaped cartilage ring. The cartilage ring protects the trachea from collapse and injury.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278060
Which of the following structures is the actual gas exchange surface in the mammalian respiratory system?
1 Bronchus
2 Alveolus
3 Bronchiole
4 Trachea
Explanation:
(b) Alveoli are the exchange surfaces in mammalian lungs. All the other structures listed are dead space used to transport air to and from the alveoli.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278061
Cartilaginous rings in respiratory passage are present in
1 Trachea only
2 Trachea and initial part of bronchi only
3 Trachea, bronchi and initial bronchioles only
4 Trachea, bronchi and all bronchioles
Explanation:
(c) Cartilaginous rings in respiratory passage are present in trachea, bronchi and initial bronchioles only.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278062
Which of the following group are supported by incomplete cartilaginous rings?
1 Pharynx, primary & tertiary bronchi and initial bronchioles.
2 Trachea, primary & secondary bronchi, and initial bronchioles.
3 Larynx, primary, secondary and tertiary bronchi, and initial bronchioles.
4 Trachea, primary, secondary and tertiary bronchi, and initial bronchioles.
278058
The smallest and thinnest tube in the lung is
1 trachea
2 Layno
3 bronchi
4 bronchiole
Explanation:
(d)
NCERT Page-269/ N-184$
BREATHING and EXCHANGE OF GASES
278059
Even when there is no air in it, human trachea does not collapse due to presence of
1 bony rings
2 turgid pressure
3 chitinous rings
4 cartilaginous rings
Explanation:
(d) Trachea is a membranous tube supported by " $C$ " shaped cartilage ring. The cartilage ring protects the trachea from collapse and injury.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278060
Which of the following structures is the actual gas exchange surface in the mammalian respiratory system?
1 Bronchus
2 Alveolus
3 Bronchiole
4 Trachea
Explanation:
(b) Alveoli are the exchange surfaces in mammalian lungs. All the other structures listed are dead space used to transport air to and from the alveoli.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278061
Cartilaginous rings in respiratory passage are present in
1 Trachea only
2 Trachea and initial part of bronchi only
3 Trachea, bronchi and initial bronchioles only
4 Trachea, bronchi and all bronchioles
Explanation:
(c) Cartilaginous rings in respiratory passage are present in trachea, bronchi and initial bronchioles only.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278062
Which of the following group are supported by incomplete cartilaginous rings?
1 Pharynx, primary & tertiary bronchi and initial bronchioles.
2 Trachea, primary & secondary bronchi, and initial bronchioles.
3 Larynx, primary, secondary and tertiary bronchi, and initial bronchioles.
4 Trachea, primary, secondary and tertiary bronchi, and initial bronchioles.
278058
The smallest and thinnest tube in the lung is
1 trachea
2 Layno
3 bronchi
4 bronchiole
Explanation:
(d)
NCERT Page-269/ N-184$
BREATHING and EXCHANGE OF GASES
278059
Even when there is no air in it, human trachea does not collapse due to presence of
1 bony rings
2 turgid pressure
3 chitinous rings
4 cartilaginous rings
Explanation:
(d) Trachea is a membranous tube supported by " $C$ " shaped cartilage ring. The cartilage ring protects the trachea from collapse and injury.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278060
Which of the following structures is the actual gas exchange surface in the mammalian respiratory system?
1 Bronchus
2 Alveolus
3 Bronchiole
4 Trachea
Explanation:
(b) Alveoli are the exchange surfaces in mammalian lungs. All the other structures listed are dead space used to transport air to and from the alveoli.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278061
Cartilaginous rings in respiratory passage are present in
1 Trachea only
2 Trachea and initial part of bronchi only
3 Trachea, bronchi and initial bronchioles only
4 Trachea, bronchi and all bronchioles
Explanation:
(c) Cartilaginous rings in respiratory passage are present in trachea, bronchi and initial bronchioles only.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278062
Which of the following group are supported by incomplete cartilaginous rings?
1 Pharynx, primary & tertiary bronchi and initial bronchioles.
2 Trachea, primary & secondary bronchi, and initial bronchioles.
3 Larynx, primary, secondary and tertiary bronchi, and initial bronchioles.
4 Trachea, primary, secondary and tertiary bronchi, and initial bronchioles.
278058
The smallest and thinnest tube in the lung is
1 trachea
2 Layno
3 bronchi
4 bronchiole
Explanation:
(d)
NCERT Page-269/ N-184$
BREATHING and EXCHANGE OF GASES
278059
Even when there is no air in it, human trachea does not collapse due to presence of
1 bony rings
2 turgid pressure
3 chitinous rings
4 cartilaginous rings
Explanation:
(d) Trachea is a membranous tube supported by " $C$ " shaped cartilage ring. The cartilage ring protects the trachea from collapse and injury.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278060
Which of the following structures is the actual gas exchange surface in the mammalian respiratory system?
1 Bronchus
2 Alveolus
3 Bronchiole
4 Trachea
Explanation:
(b) Alveoli are the exchange surfaces in mammalian lungs. All the other structures listed are dead space used to transport air to and from the alveoli.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278061
Cartilaginous rings in respiratory passage are present in
1 Trachea only
2 Trachea and initial part of bronchi only
3 Trachea, bronchi and initial bronchioles only
4 Trachea, bronchi and all bronchioles
Explanation:
(c) Cartilaginous rings in respiratory passage are present in trachea, bronchi and initial bronchioles only.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278062
Which of the following group are supported by incomplete cartilaginous rings?
1 Pharynx, primary & tertiary bronchi and initial bronchioles.
2 Trachea, primary & secondary bronchi, and initial bronchioles.
3 Larynx, primary, secondary and tertiary bronchi, and initial bronchioles.
4 Trachea, primary, secondary and tertiary bronchi, and initial bronchioles.
278058
The smallest and thinnest tube in the lung is
1 trachea
2 Layno
3 bronchi
4 bronchiole
Explanation:
(d)
NCERT Page-269/ N-184$
BREATHING and EXCHANGE OF GASES
278059
Even when there is no air in it, human trachea does not collapse due to presence of
1 bony rings
2 turgid pressure
3 chitinous rings
4 cartilaginous rings
Explanation:
(d) Trachea is a membranous tube supported by " $C$ " shaped cartilage ring. The cartilage ring protects the trachea from collapse and injury.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278060
Which of the following structures is the actual gas exchange surface in the mammalian respiratory system?
1 Bronchus
2 Alveolus
3 Bronchiole
4 Trachea
Explanation:
(b) Alveoli are the exchange surfaces in mammalian lungs. All the other structures listed are dead space used to transport air to and from the alveoli.
NCERT Page-272 / N-187
BREATHING and EXCHANGE OF GASES
278061
Cartilaginous rings in respiratory passage are present in
1 Trachea only
2 Trachea and initial part of bronchi only
3 Trachea, bronchi and initial bronchioles only
4 Trachea, bronchi and all bronchioles
Explanation:
(c) Cartilaginous rings in respiratory passage are present in trachea, bronchi and initial bronchioles only.
NCERT Page-269 / N-184
BREATHING and EXCHANGE OF GASES
278062
Which of the following group are supported by incomplete cartilaginous rings?
1 Pharynx, primary & tertiary bronchi and initial bronchioles.
2 Trachea, primary & secondary bronchi, and initial bronchioles.
3 Larynx, primary, secondary and tertiary bronchi, and initial bronchioles.
4 Trachea, primary, secondary and tertiary bronchi, and initial bronchioles.
