Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because?
1. | there is a negative pressure in the lungs |
2. | there is a negative intrapleural pressure pulling at the lung walls |
3. | there is a positive intrapleural pressure |
4. | pressure in the lungs is higher than the atmospheric pressure |
Assertion (A): | The thoracic chamber, being airtight, is critical for breathing. |
Reason (R): | Movement of rib cage can bring about inhalation and exhalation. |
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. | (A) is False but (R) is True. |
Statement I: | The alveoli have ciliated cells in them to help expel dust particles that make it this far down into the respiratory tract. |
Statement II: | Gas exchange between the lungs and the blood, and between the blood and tissue fluid, is an active transport process. |
Branchial respiration is seen in all the following except:
1. Aquatic arthropods | 2. Fishes |
3. Amphibians like frog | 4. Aquatic mollusks |