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Assertion : The lungs are situated in th...

Assertion : The lungs are situated in thoracic chamber which is anatomically an air-tighlt chamber.
Reason : Such an arrangement is essential to avoid an change in pulmonary volume.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true and reason is not the correct explanation of assertion

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that the lungs are located in the thoracic chamber, which is an airtight chamber. - This means that the thoracic cavity is sealed off from the external environment, allowing for controlled air movement only between the lungs and the outside air. 2. **Understanding the Reason**: - The reason given is that this airtight arrangement is essential to avoid any change in pulmonary volume. - Pulmonary volume refers to the total volume of air that the lungs can hold. 3. **Analyzing the Relationship**: - The assertion is true: the lungs are indeed located in an airtight thoracic cavity. - However, the reason provided is misleading. While the airtight nature of the thoracic cavity does help in maintaining proper lung function, it does not directly prevent changes in pulmonary volume. 4. **Conclusion**: - The assertion is correct, but the reason is not a valid explanation for the assertion. - Therefore, the correct answer is that the assertion is true, but the reason is false. ### Final Answer: - The assertion is true, and the reason is false.
### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that the lungs are located in the thoracic chamber, which is an airtight chamber. - This means that the thoracic cavity is sealed off from the external environment, allowing for controlled air movement only between the lungs and the outside air. 2. **Understanding the Reason**: - The reason given is that this airtight arrangement is essential to avoid any change in pulmonary volume. ...
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