The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :
1. pO2 = 95 and pCO2 = 40
2. pO2 = 159 and pCO2 = 0.3
3. pO2 = 104 and pCO2 = 40
4. pO2 = 40 and pCO2 = 45
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following columns and select the correct option:
Column I | Column II | ||
(a) | Pneumotaxic Centre | (i) | Alveoli |
(b) | O2 Dissociation curve | (ii) | Pons region of the brain |
(c) | Carbonic Anhydrase | (iii) | Haemoglobin |
(d) | Primary site of exchange of gases | (iv) | R.B.C. |
Options: | (a) | (b) | (c) | (d) |
1. | (i) | (iii) | (ii) | (iv) |
2. | (ii) | (iii) | (iv) | (i) |
3. | (iii) | (ii) | (iv) | (i) |
4. | (iv) | (i) | (iii) | (ii) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe partial pressure of oxygen in the alveoli of the lungs is:
1. equal to that in the blood
2. more than that in the blood
3. less than that in the blood
4. less than that of carbon dioxide
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?
1. | A – Alveolar cavity – main site of exchange of respiratory gases |
2. | D – Capillary wall – exchange of O2 and CO2 takes place here |
3. | B – Red blood cell – transport of CO2 mainly. |
4. | C – Arterial capillary – passes oxygen to tissues |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTransport of gases in alveoli takes place by:
1. Active transport | 2. Passive transport |
3. Simple diffusion | 4. None of the above |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology