- 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 |
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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
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The peripheral chemoreceptors in carotid and aortic bodies respond to:
1. hydrogen ion concentration.
2. levels of carbon dioxide in the blood.
3. levels of oxygen in the blood.
4. all of the above
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What will happern to the rate and depth of breathing when blood carbon dioxide rises?
| 1. decreases | 2. increases |
| 3. stays the same | 4. stops |
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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 |
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The peripheral chemoreceptors are:
1. more sensitive to a decrease in than to a decrease in
2. stimulated by hypocapnia
3. located in the medulla oblongata of the brain stem
4. more sensitive to a decrease in than to a decrease in
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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 |
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Study the given figure showing the neural regulation of respiration in humans and select the correct statements from the given statements.
Statement I: The location of the pneumotaxic centre is the Pons of the brain stem and it moderates the function of respiratory rhythm centre.
Statement II: The respiratory rhythm centre is the dorsal respiratory group shown in the figure and is also located in the Pons of the brain stem.
1. Only Statement I is true
2. Only Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false
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- 1(current)
Q. No.
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