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Q. No.Which of the following disorders represents decrease in respiratory surface due to damaged alveolar walls?
1. Hypocapnia
2. Bronchitis
3. Asthma
4. Emphysema
1. Hypocapnia
2. Bronchitis
3. Asthma
4. Emphysema
Subtopic: Respiratory Disorders: Part 1 |
90%
From NCERT
NEET - 2022
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In the regulation of respiration, a chemosensitive area adjacent to the rhythm centre in the medulla region of the brain, is highly sensitive to:
1. \(HCO^-_3\)
2. \(CO_2\)
3. \(O_2\)
4. \(N_2\)
Subtopic: Respiratory System: Regulation of Respiration |
80%
From NCERT
NEET - 2022
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When you take a deep breath, your stomach moves out because
1. swallowing air increases the volume of the thoracic cavity
2. your stomach shouldn’t move out when you take a deep breath because you want the volume of your chest cavity to increase, not your abdominal cavity
3. contracting your abdominal muscles pushes your stomach out, generating negative pressure in your lungs.
4. when your diaphragm contracts, it moves down, pressing your abdominal cavity out.
1. swallowing air increases the volume of the thoracic cavity
2. your stomach shouldn’t move out when you take a deep breath because you want the volume of your chest cavity to increase, not your abdominal cavity
3. contracting your abdominal muscles pushes your stomach out, generating negative pressure in your lungs.
4. when your diaphragm contracts, it moves down, pressing your abdominal cavity out.
Subtopic: Respiratory System: Exchange of Gases |
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A:
In mammals –ve pressure breathing takes place.
R: Inspiration can occurs if the transpulmonary pressure is less than the atmospheric pressurea
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
R: Inspiration can occurs if the transpulmonary pressure is less than the atmospheric pressurea
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Respiratory System: Exchange of Gases |
77%
From NCERT
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Haldane effect explain –
1. Decrease in affinity of haemoglobin for oxygen due to presence of 2, 3 DGP
2. Increased ability of oxy-haemoglobin to take up more CO2 as bicarbonate
3. Increased ability of reduced haemoglobin to take up more CO2 as bicarbonate and cabamino form.
4. Dissociation of O2 from oxy-haemoglobin.
1. Decrease in affinity of haemoglobin for oxygen due to presence of 2, 3 DGP
2. Increased ability of oxy-haemoglobin to take up more CO2 as bicarbonate
3. Increased ability of reduced haemoglobin to take up more CO2 as bicarbonate and cabamino form.
4. Dissociation of O2 from oxy-haemoglobin.
Subtopic: Respiratory System: Transport of Gases |
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In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: Even the cartilaginous ring is absent in respiratory bronchiole, it does not collapse during rapid expiration.
R: Respiratory bronchiole is lined with few surfactant releasing cells
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A: Even the cartilaginous ring is absent in respiratory bronchiole, it does not collapse during rapid expiration.
R: Respiratory bronchiole is lined with few surfactant releasing cells
Subtopic: Respiratory System: Upper Respiratory Tract | Respiratory System: Exchange of Gases |
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A decrease in the pH of human blood caused by exercise would
1. decrease breathing rate
2. increase heart rate
3. decrease the amount of O2 unloaded form hemoglobin
4. decrease cardiac output
1. decrease breathing rate
2. increase heart rate
3. decrease the amount of O2 unloaded form hemoglobin
4. decrease cardiac output
Subtopic: Respiratory System: Pulmonary Volumes & Capacities | Respiratory System: Exchange of Gases |
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Which of the following is not involved in speeding up breathing?
1. signals from the aorta to the medulla in response to low blood pH.
2. stretch receptors in the lungs
3. impulses from the breathing centers in the medulla
4. severe deficiencies of oxygen
1. signals from the aorta to the medulla in response to low blood pH.
2. stretch receptors in the lungs
3. impulses from the breathing centers in the medulla
4. severe deficiencies of oxygen
Subtopic: Respiratory System: Regulation of Respiration |
52%
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Values of partial pressure of oxygen and carbon dioxide in alveolar air are 104 mm Hg and 40 mm Hg respectively. Similar values in the venous blood are:
1. 104 mm Hg and 40 mm Hg
2. 40 mm Hg and 45 mm Hg
3. 46 mm Hg and 37 mm Hg
4. 120 mm Hg and 60 mm Hg
1. 104 mm Hg and 40 mm Hg
2. 40 mm Hg and 45 mm Hg
3. 46 mm Hg and 37 mm Hg
4. 120 mm Hg and 60 mm Hg
Subtopic: Respiratory System: Exchange of Gases |
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From NCERT
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Which of the following are correct with respect to the mechanism of breathing?
A. Tidal volume + inspiratory reserve volume is called vital capacity
B. Inspiration occurs when the intra-pulmonary pressure is less than atmospheric pressure
C. Relaxation of the diaphragm and the intercostal muscles results in reducing the pulmonary volume
D. An increase in pulmonary volume decreases the intra-pulmonary pressure to less than the atmospheric pressure
E. Volume of air that will remain in the lungs even after a forcible expiration is called expiratory reserve volume
Choose the correct answer from the options given below:
1. A, B and C only
2. B, C and D only
3. C, D and E only
4. A, B and E only
A. Tidal volume + inspiratory reserve volume is called vital capacity
B. Inspiration occurs when the intra-pulmonary pressure is less than atmospheric pressure
C. Relaxation of the diaphragm and the intercostal muscles results in reducing the pulmonary volume
D. An increase in pulmonary volume decreases the intra-pulmonary pressure to less than the atmospheric pressure
E. Volume of air that will remain in the lungs even after a forcible expiration is called expiratory reserve volume
Choose the correct answer from the options given below:
1. A, B and C only
2. B, C and D only
3. C, D and E only
4. A, B and E only
Subtopic: Respiratory System: Pulmonary Volumes & Capacities |
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