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Q. No.Assertion (A): The respiratory rhythm centre, located in the pons region of brain is responsible for regulation of respiration.
Reason (R): Pneumotaxic centre, located in the medulla region of brain moderates the respiratory rhythm centre.
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: Â Respiratory System: Regulation of Respiration |
 72%
Level 2: 60%+
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Assertion (A): The lungs present in the thoracic chamber is an anatomically air-tight chamber.
Reason (R): The role of oxygen in the regulation fo respiratory rhythm is quite significant.
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.
Reason (R): The role of oxygen in the regulation fo respiratory rhythm is quite significant.
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: Â Respiratory System: Trachea & Basic Anatomy of Lung |Â Respiratory System: Regulation of Respiration |
 63%
Level 2: 60%+
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Subtopic: Â Respiratory System: Transport of Gases Part 1 |Â Respiratory System: Transport of Gases Part 2 |Â Respiratory System: Transport of Gases |
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Which of the following is not a stimulus for breathing?
1. Arterial pH resulting from CO2 retention
2. Arterial pO2 below 60 mm Hg
3. Rising blood pressure
4. Rising CO2 levels
1. Arterial pH resulting from CO2 retention
2. Arterial pO2 below 60 mm Hg
3. Rising blood pressure
4. Rising CO2 levels
Subtopic: Â Respiratory System: Regulation of Respiration |
 55%
Level 3: 35%-60%
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When we breath in, we inhale many gases, including oxygen. What happens to the gases that the body cannot use?
1. They are absorbed into the digestive system and used to create energy
2. They circulate through the body and are disposed off later
3. They are changed into oxygen by the lungs
4. They are exhaled
1. They are absorbed into the digestive system and used to create energy
2. They circulate through the body and are disposed off later
3. They are changed into oxygen by the lungs
4. They are exhaled
Subtopic: Â Respiratory System: Exchange of Gases |
 67%
Level 2: 60%+
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A large proportion of oxygen is let unused in the human is left unused in the human blood even after its uptake by the body tissues. This O2 :
1. Helps in releasing more O2 to the epithelial tissues
2. Is enough to keep oxyhaemoglobin saturation at 96%
3. Raises pCO2 of blood to 75 mm Hg
4. Acts as a reserve during muscular exercise
1. Helps in releasing more O2 to the epithelial tissues
2. Is enough to keep oxyhaemoglobin saturation at 96%
3. Raises pCO2 of blood to 75 mm Hg
4. Acts as a reserve during muscular exercise
Subtopic: Â Respiratory System: Exchange of Gases |Â Respiratory System: Transport of Gases Part 1 |
 80%
Level 1: 80%+
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Match the columns:
1. A = iii, B = iv, C = ii, D = ii
2. A = iv, B = iii, C - i, D = ii
3. A = iv, B = iii, C = ii, D = i
4. A = i, B = ii, C = iv, D = iii
| Column - I | Column - II |
| A. Carboxyhaemoglobin | i. O2 |
| B. Carbaminohaemoglobin | ii. NO-3 |
| C. Methaemoglobin | iii. CO2 |
| D. Oxyhaemoglobin | iv. CO |
1. A = iii, B = iv, C = ii, D = ii
2. A = iv, B = iii, C - i, D = ii
3. A = iv, B = iii, C = ii, D = i
4. A = i, B = ii, C = iv, D = iii
Subtopic: Â Respiratory System: Transport of Gases Part 1 |Â Respiratory System: Transport of Gases Part 2 |Â Respiratory System: Transport of Gases |
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Read the following statements and choose the correct option :
A. Bacteria that reach the lungs, rarely survive.
B. Alveoli of normal lungs are lined by a film of lecithin which kills bacteria.
1. Statement A is correct and B incorrect
2. Statement B is correct and A incorrect
3. Both the statements are correct
4. Both the statements are incorrect
A. Bacteria that reach the lungs, rarely survive.
B. Alveoli of normal lungs are lined by a film of lecithin which kills bacteria.
1. Statement A is correct and B incorrect
2. Statement B is correct and A incorrect
3. Both the statements are correct
4. Both the statements are incorrect
Subtopic: Â Respiratory System: Upper Respiratory Tract |Â Respiratory System: Trachea & Basic Anatomy of Lung |
Level 3: 35%-60%
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Which of the following is true for Bohr effect?
1. All the factors that shift the oxygen haemoglobin dissociation curve to the right increase Bohr effect
2. The overall result of Bohr effect is to allow greater O2 transport from lungs to tissues
3. Increase in CO2 concentration in the blood results in increased dissociation of oxyhaemoglobin
4. More than one option is correct
1. All the factors that shift the oxygen haemoglobin dissociation curve to the right increase Bohr effect
2. The overall result of Bohr effect is to allow greater O2 transport from lungs to tissues
3. Increase in CO2 concentration in the blood results in increased dissociation of oxyhaemoglobin
4. More than one option is correct
Subtopic: Â Respiratory System: Transport of Gases Part 1 |Â Respiratory System: Transport of Gases Part 2 |Â Respiratory System: Transport of Gases |
 77%
Level 2: 60%+
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Read the following statements and choose the correct option:
1. Statement A is correct and Statement B is incorrect
2. Statement A is incorrect and Statement B is correct
3. Both Statement A and Statement B are correct
4. Both Statement A and Statement B are incorrect
| A. | All the terrestrial vertebrates are air-breathers. |
| B. | They have developed lungs for breathing, an adaption for land life. |
2. Statement A is incorrect and Statement B is correct
3. Both Statement A and Statement B are correct
4. Both Statement A and Statement B are incorrect
Subtopic: Â Respiratory Organs |
 78%
Level 2: 60%+
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