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

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 58%
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NEET - 2016
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Consider the given two statements:
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.
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
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The heart, trachea, esophagus and associated structures are located in the space between the two lungs called as:
1. mediastinum
2. pleural cavity
3. thoracic cavity
4. parietal cavity
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung | Respiratory Organs |
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Consider the two statements:
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.

1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 54%
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Branchial respiration is seen in all the following except:

1. Aquatic arthropods 2. Fishes
3. Amphibians like frog 4. Aquatic mollusks
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 57%
From NCERT
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