Why Do We Need Lungs

Q.

The exchange of gases takes place in the ________.

Q.

What are the different types of gas exchange systems in animals?

Q.

Why don't lungs collapse even after forceful expiration?

Q.

Describe how the exchange of gases takes place in the lungs.

Q.

What are the constituents of exhaled air?

Q. Statement 1: Lungs become empty after forceful expiration
Statement 2: The forcefully exhaled air is called residual volume of air.

1. Only statement 1 is true
2. Only statement 2 is true
3. Both statement 1 and statement 2 are true
4. Both statement 1 and statement 2 are false

Q. Statement 1: Lungs become empty after forceful expiration
Statement 2: The forcefully exhaled air is called residual volume of air.

1. Only statement 1 is true
2. Only statement 2 is true
3. Both statement 1 and statement 2 are true
4. Both statement 1 and statement 2 are false

Q. Identify the structure shown below:

1. Arteries
2. Pharynx
3. Alveoli
4. Capillaries

Q. When the volume inside the lungs increases, the intrapulmonary pressure .

1. equalises
2. decreases
3. increases

Q.

What is the advantage of residual volume of air in lungs? Explain

Q. Assertion :If there is no air in trachea, it will collapse. Reason: Trachea is devoid of the cartiagenous rings.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Identify the structure shown below:

1. Arteries
2. Pharynx
3. Alveoli
4. Capillaries

Q. Identify the structure shown below:

1. Capillaries
2. Pharynx
3. Alveoli
4. Arteries

Q.

Lungs are also excretory organs.

Q.

Question 4
How are the lungs designed in human beings to maximise the area for exchange of gases?

Q. Statement 1: Lungs become empty after forceful expiration
Statement 2: The forcefully exhaled air is called residual volume of air.

1. Only statement 1 is true
2. Only statement 2 is true
3. Both statement 1 and statement 2 are true
4. Both statement 1 and statement 2 are false