Q. No.Select the last step involved in respiration
| 1. | Diffusion of gases |
| 2. | Breathing |
| 3. | Utilisation of \(O_2\) by body cells and resultant release of \(CO_2\) |
| 4. | Transport of gases |
Subtopic: Respiratory System: Exchange of Gases | Respiratory System: Regulation of Respiration |
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Level 1: 80%+
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Under normal resting conditions, almost the entire respiratory effort is due to the:
1. contraction and relaxation of the diaphragm
2. movements of the rib cage
3. abdominal muscles
4. sternocleidomastoid muscle
Subtopic: Respiratory System: Trachea & Basic Anatomy of Lung | Respiratory System: Regulation of Respiration |
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Level 1: 80%+
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Given below are two statements:
| Assertion (A): | Increased CO2 and H+ at the tissue level shift the oxygen haemoglobin dissociation curve to the right side. |
| Reason (R): | Binding of CO2 and H+ with the haemoglobin decreases the affinity between haemoglobin and oxygen favouring the unloading of O2. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Respiratory System: Regulation of Respiration |
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Level 1: 80%+
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Pneumotaxic centre which can moderate the functions of the respiratory rhythm centre is present at:
| 1. | Pons region of brain |
| 2. | Thalamus |
| 3. | Spinal cord |
| 4. | Right cerebral hemisphere |
Subtopic: Respiratory System: Regulation of Respiration |
98%
Level 1: 80%+
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Subtopic: Respiratory System: Regulation of Respiration |
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Level 1: 80%+
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Chemosensitive area situated adjacent to the rhythm center is highly sensitive to
A: Carbon dioxide
B: Oxygen
C: Hydrogen ions
1. Only A and B
2. Only A and C
3. Only B and C
4. A, B and C
A: Carbon dioxide
B: Oxygen
C: Hydrogen ions
1. Only A and B
2. Only A and C
3. Only B and C
4. A, B and C
Subtopic: Respiratory System: Regulation of Respiration |
89%
Level 1: 80%+
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Subtopic: Respiratory System: Regulation of Respiration |
91%
Level 1: 80%+
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Which respiratory centre primarly limits inspiration?
| 1. | Dorsal respiratory group of neutrons |
| 2. | Ventral group of neutrons |
| 3. | Pneumotaxic centre |
| 4. | Apneustic centre |
Subtopic: Respiratory System: Regulation of Respiration |
88%
Level 1: 80%+
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Breathing rate will automatically increase when
| 1. | Blood pH is high. |
| 2. | Blood acidity decreases. |
| 3. | The amount of carbon dioxide in the. blood increases. |
| 4. | Hemoglobin is unloaded. |
Subtopic: Respiratory System: Regulation of Respiration |
84%
Level 1: 80%+
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Identify the region of human brain which has pneumotaxic centre that alters respiratory rate by reducing the duration of inspiration.
| 1. | Medulla | 2. | Pons |
| 3. | Thalamus | 4. | Cerebrum |
Subtopic: Respiratory System: Regulation of Respiration |
84%
Level 1: 80%+
NEET - 2022
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