- 1(current)
Q. No.The part of the human brain where the main respiratory center is located is:
| 1. | pons varolii | 2. | cerebrum |
| 3. | medulla oblongata | 4. | thalamus |
Subtopic: Respiratory System: Regulation of Respiration |
81%
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Regarding neural regulation of respiration in humans:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The respiratory rhythm is present in the medulla region of the brain. |
| II: | Pneumotaxic centre present in cerebrum can moderate the functions of the respiratory rhythm centre. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Respiratory System: Regulation of Respiration |
75%
From NCERT
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The respiratory rhythm center:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | is located in the medulla oblongata. |
| II: | regulates the duration of inhalation and increases respiratory rate. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Respiratory System: Regulation of Respiration |
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The duration of inspiration can be reduced by:
| 1. | an increase of carbon dioxide in blood |
| 2. | a chemical signal from aortic and carotid bodies |
| 3. | a neural signal from pneumotaxic center |
| 4. | an increase in hydrogen ion concentration in CSF |
Subtopic: Respiratory System: Regulation of Respiration |
75%
From NCERT
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Pneumotaxic center:
| 1. | moderates the function of the rhythm center |
| 2. | establishes the respiratory rhythm |
| 3. | is located in medulla oblongata |
| 4. | reduces the duration of expiration and thereby alters the respiratory rate |
Subtopic: Respiratory System: Regulation of Respiration |
67%
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A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to:
I: CO2
II: O2
III: hydrogen ions
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
I: CO2
II: O2
III: hydrogen ions
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Respiratory System: Regulation of Respiration |
87%
From NCERT
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Peripheral chemoreceptors for regulation of respiration are located:
1. In the aorta and the carotid artery
2. In the medulla oblongata
3. In the pons
4. In the alveoli
1. In the aorta and the carotid artery
2. In the medulla oblongata
3. In the pons
4. In the alveoli
Subtopic: Respiratory System: Regulation of Respiration |
67%
From NCERT
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The respiratory center in humans can be primarily stimulated by:
1. carbon dioxide and hydrogen ions
2. oxygen gas levels in the blood
3. oxygen gas levels in the hemoglobin
4. conscious feeling for the need for more oxygen
Subtopic: Respiratory System: Regulation of Respiration |
80%
From NCERT
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Consider the two statements:
| Statement I: | Peripheral chemoreceptors can recognise changes in \(CO_2\) and \(H^+\) concentration |
| Statement II: | The role of oxygen in the regulation of respiratory rhythm is quite insignificant |
| 1. | Statement I is correct and Statement II is incorrect |
| 2. | Statement I is incorrect and Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Respiratory System: Regulation of Respiration |
92%
From NCERT
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