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Q. No.Select the favorable conditions required for the formation of oxyhemoglobin at the alveoli.
1. High pO2, high pCO2, less H+, higher temperature
2. Low pO2, low pCO2, more H+, higher temperature
3. High pO2, low pCO2, less H+, lower temperature
4. Low pO2 high pCO2 more H+, higher temperature
Subtopic: Respiratory System: Transport of Gases |
89%
From NCERT
NEET - 2021
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
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
Subtopic: Respiratory System: Exchange of Gases |
76%
From NCERT
NEET - 2021
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Match 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) |
Subtopic: Respiratory System: Exchange of Gases | Respiratory System: Regulation of Respiration |
93%
From NCERT
NEET - 2020
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The Total Lung Capacity (TLC) is the total volume of air accommodated in the lungs at the end of forced inspiration.
This includes:
| 1. | RV; IC (Inspiratory Capacity); EC (Expiratory Capacity); and ERV |
| 2. | RV; ERV; IC and EC |
| 3. | RV; ERV; VC (Vital Capacity) and FRC (Functional Residual Capacity) |
| 4. | RV (Residual Volume); ERV (Expiratory Reserve Volume); TV (Tidal Volume); and IRV (Inspiratory Reserve Volume) |
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
86%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
The conducting part of the human respiratory system transports atmospheric air to alveoli and also performs all the following functions except:
1. Clears the inhaled air of foreign particles
2. Humidifies the air
3. Brings the air to body temperature
4. Provides site for diffusion of gases into the blood
1. Clears the inhaled air of foreign particles
2. Humidifies the air
3. Brings the air to body temperature
4. Provides site for diffusion of gases into the blood
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung |
89%
From NCERT
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Under normal physiological conditions:
| 1. | Inspiratory reserve volume is less than expiratory reserve volume |
| 2. | Residual volume in a healthy male is about 2500 to 3000 ml |
| 3. | Functional residual capacity should be more than expiratory capacity |
| 4. | Total lung capacity + residual volume = Vital capacity |
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
73%
From NCERT
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In a healthy human, under normal physiological conditions the partial pressure of oxygen in systemic [oxygenated blood] circulation is:
1. about 104 mm Hg
2. about 40 mm Hg
3. about 95 mm Hg
4. about 159 mm Hg
1. about 104 mm Hg
2. about 40 mm Hg
3. about 95 mm Hg
4. about 159 mm Hg
Subtopic: Respiratory System: Exchange of Gases |
81%
From NCERT
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Which of the following statements is not correct?
| 1. | Every 100 ml of oxygenated blood can deliver around 5 ml of oxygen to the tissue under normal physiological conditions. |
| 2. | Oxygen gas has most potent effect on the central chemoreceptors and plays most vital role in regulation of respiration |
| 3. | Nearly 70 percent of carbon dioxide is carried as bicarbonate in the blood. |
| 4. | Every 100 ml of deoxygenated blood delivers about 4 ml of carbon dioxide to the alveoli. |
Subtopic: Respiratory System: Regulation of Respiration |
86%
From NCERT
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Inspiration during breathing occurs when the pressure in lungs is:
1. Zero
2. Negative with respect to atmospheric pressure
3. Equal to atmospheric pressure
4. Positive with respect to atmospheric pressure
1. Zero
2. Negative with respect to atmospheric pressure
3. Equal to atmospheric pressure
4. Positive with respect to atmospheric pressure
Subtopic: Respiratory System: Pulmonary Ventilation |
94%
From NCERT
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In the diffusion membrane in human lungs, a basement membrane supports:
| I. Alveolar epithelium | II. Vascular endothelium |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Respiratory System: Exchange of Gases |
71%
From NCERT
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