[Solved] Which of the following statements about the respiratory membrane is correct? — Ans: It consists of alveolar and capillary walls allowing gas diffusion | General Science

General Science - Physics (Basics)

Which of the following statements about the respiratory membrane is correct?

AIt consists of alveolar and capillary walls allowing gas diffusion

BIt is thick to prevent harmful gases from entering blood

CIt is made of cartilage to keep airways open

DIt produces mucus to trap dust particles

Step-by-Step Solution

Step 1: Understand respiratory membrane structure
The respiratory membrane is the thin barrier between alveoli and blood capillaries.
Step 2: Analyze its function
It allows diffusion of oxygen and carbon dioxide; thickness is minimal for efficient gas exchange.
Step 3: Eliminate incorrect options
It is not thick; cartilage is in trachea/bronchi, not membrane; mucus production occurs in respiratory tract lining, not membrane.
Final Answer:
It consists of alveolar and capillary walls allowing gas diffusion → Option A
Quick Check:
Respiratory membrane = Alveolar and capillary walls ✅

Quick Trick: Thin respiratory membrane enables gas diffusion.

Common Mistakes:

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