- 1(current)
Q. No.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: Â Respiratory System: Regulation of Respiration |
 86%
From NCERT
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An increase in carbon dioxide concentration in the blood would:
A: lead to an increase in the pH of CSF
B: stimulate respiration
| 1. | Only A | 2. | Only B |
| 3. | Both A and B | 4. | Neither A nor B |
Subtopic: Â Respiratory System: Regulation of Respiration |
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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. |
| (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: Â Respiratory System: Exchange of Gases |Â Respiratory System: Regulation of Respiration |Â Respiratory System: Transport of Gases |
 94%
From NCERT
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The dorsal respiratory group of the respiratory center in the brain stem stimulates:
| 1. external intercostals | 2. internal intercostals |
| 3. diaphragm | 4. rectus abdominus |
Subtopic: Â Respiratory System: Regulation of Respiration |
Another centre present in the pons region of the brain can moderate the functions of the respiratory rhythm centre. What is incorrect regarding this centre?
1. It is called the pneumotaxic centre
2. It stimulates/prolongs inspiration
3. Its action can lead to the alteration of the respiratory rate
4. Signals from this centre can reduce the duration of inspiration
Subtopic: Â Respiratory System: Regulation of Respiration |
 52%
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