NEET Test Series from KOTA - 10 Papers In MS WORD
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BIOXI17: BREATHING AND EXCHANGE OF GASES
338695
At which of the following sites is the partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) highest?
1 Exhaled gas
2 Anatomical dead space at the end of expiration
3 Anatomical dead space at the end of inspiration
4 Alveolar gas
Explanation:
The partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) is highest in alveolar gas which is \({\rm{104}}\;{\rm{mmHg}}\).
BIOXI17: BREATHING AND EXCHANGE OF GASES
338696
Exchange of gases occurs
1 By diffusion
2 Between blood and tissue
3 Between alveoli and pulmonary blood capillary
4 All of the above
Explanation:
Alveoli are the primary sites of exchange of gases. Exchange of gases occurs between alveoli and pulmonary blood capillary and also occur between blood and tissues. \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\) are exchanged in these sites by simple diffusion mainly based on pressure/ concentration gradient.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338697
Alveoli of the lungs are lined by
1 Simple epithelium
2 Squamous epithelium
3 Cubodial epithelium
4 Ciliated epithelium
Explanation:
Squamous epithelium consists of a flat disc-like cells with a centrally located and oval or spherical nucleus (polygonal in surface). It looks like the tiles of floor. It forms inner lining of the lung alveoli, because it allows efficient diffusion of gases across it.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338698
The total thickness of the diffusion membrane of alveolus capillary is
1 Less than \(1 \mathrm{~cm}\)
2 Less than \(2 \mathrm{~cm}\)
3 Less than \(1 \mathrm{~mm}\)
4 More than \(1 \mathrm{~mm}\)
Explanation:
The diffusion membrane is made up of three major layers namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them. However, its total thickness is much less than a millimetre.
338695
At which of the following sites is the partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) highest?
1 Exhaled gas
2 Anatomical dead space at the end of expiration
3 Anatomical dead space at the end of inspiration
4 Alveolar gas
Explanation:
The partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) is highest in alveolar gas which is \({\rm{104}}\;{\rm{mmHg}}\).
BIOXI17: BREATHING AND EXCHANGE OF GASES
338696
Exchange of gases occurs
1 By diffusion
2 Between blood and tissue
3 Between alveoli and pulmonary blood capillary
4 All of the above
Explanation:
Alveoli are the primary sites of exchange of gases. Exchange of gases occurs between alveoli and pulmonary blood capillary and also occur between blood and tissues. \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\) are exchanged in these sites by simple diffusion mainly based on pressure/ concentration gradient.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338697
Alveoli of the lungs are lined by
1 Simple epithelium
2 Squamous epithelium
3 Cubodial epithelium
4 Ciliated epithelium
Explanation:
Squamous epithelium consists of a flat disc-like cells with a centrally located and oval or spherical nucleus (polygonal in surface). It looks like the tiles of floor. It forms inner lining of the lung alveoli, because it allows efficient diffusion of gases across it.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338698
The total thickness of the diffusion membrane of alveolus capillary is
1 Less than \(1 \mathrm{~cm}\)
2 Less than \(2 \mathrm{~cm}\)
3 Less than \(1 \mathrm{~mm}\)
4 More than \(1 \mathrm{~mm}\)
Explanation:
The diffusion membrane is made up of three major layers namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them. However, its total thickness is much less than a millimetre.
338695
At which of the following sites is the partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) highest?
1 Exhaled gas
2 Anatomical dead space at the end of expiration
3 Anatomical dead space at the end of inspiration
4 Alveolar gas
Explanation:
The partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) is highest in alveolar gas which is \({\rm{104}}\;{\rm{mmHg}}\).
BIOXI17: BREATHING AND EXCHANGE OF GASES
338696
Exchange of gases occurs
1 By diffusion
2 Between blood and tissue
3 Between alveoli and pulmonary blood capillary
4 All of the above
Explanation:
Alveoli are the primary sites of exchange of gases. Exchange of gases occurs between alveoli and pulmonary blood capillary and also occur between blood and tissues. \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\) are exchanged in these sites by simple diffusion mainly based on pressure/ concentration gradient.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338697
Alveoli of the lungs are lined by
1 Simple epithelium
2 Squamous epithelium
3 Cubodial epithelium
4 Ciliated epithelium
Explanation:
Squamous epithelium consists of a flat disc-like cells with a centrally located and oval or spherical nucleus (polygonal in surface). It looks like the tiles of floor. It forms inner lining of the lung alveoli, because it allows efficient diffusion of gases across it.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338698
The total thickness of the diffusion membrane of alveolus capillary is
1 Less than \(1 \mathrm{~cm}\)
2 Less than \(2 \mathrm{~cm}\)
3 Less than \(1 \mathrm{~mm}\)
4 More than \(1 \mathrm{~mm}\)
Explanation:
The diffusion membrane is made up of three major layers namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them. However, its total thickness is much less than a millimetre.
338695
At which of the following sites is the partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) highest?
1 Exhaled gas
2 Anatomical dead space at the end of expiration
3 Anatomical dead space at the end of inspiration
4 Alveolar gas
Explanation:
The partial pressure of oxygen \(\left(\mathrm{pO}_{2}\right)\) is highest in alveolar gas which is \({\rm{104}}\;{\rm{mmHg}}\).
BIOXI17: BREATHING AND EXCHANGE OF GASES
338696
Exchange of gases occurs
1 By diffusion
2 Between blood and tissue
3 Between alveoli and pulmonary blood capillary
4 All of the above
Explanation:
Alveoli are the primary sites of exchange of gases. Exchange of gases occurs between alveoli and pulmonary blood capillary and also occur between blood and tissues. \(\mathrm{O}_{2}\) and \(\mathrm{CO}_{2}\) are exchanged in these sites by simple diffusion mainly based on pressure/ concentration gradient.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338697
Alveoli of the lungs are lined by
1 Simple epithelium
2 Squamous epithelium
3 Cubodial epithelium
4 Ciliated epithelium
Explanation:
Squamous epithelium consists of a flat disc-like cells with a centrally located and oval or spherical nucleus (polygonal in surface). It looks like the tiles of floor. It forms inner lining of the lung alveoli, because it allows efficient diffusion of gases across it.
BIOXI17: BREATHING AND EXCHANGE OF GASES
338698
The total thickness of the diffusion membrane of alveolus capillary is
1 Less than \(1 \mathrm{~cm}\)
2 Less than \(2 \mathrm{~cm}\)
3 Less than \(1 \mathrm{~mm}\)
4 More than \(1 \mathrm{~mm}\)
Explanation:
The diffusion membrane is made up of three major layers namely, the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them. However, its total thickness is much less than a millimetre.
