Question

Inspired air in alveoli remains in close contact with bloodThe following layers are present in between two (a)Alveolar epithelial basement membrane (b)Capillary endothelial membrane (c)Thin interstitial space (d)Alveolar epithelium (e)Capillary basement membrane Mark the correct sequence during diffusion of CO2 (1)(b),(e),(c),(a),(d)(2)(d),(a),(c),(e),(b) (3)(a),(b),(c),(d),(e)(4)(e),(d),(c),(b),(a)

Answer 1

Answer:

option 2

Explanation:

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Answer 2

The correct sequence during diffusion of $CO_{2}$ is (2)(d),(a),(c),(e),(b).

Alveolar epithelium:

• By separating inhaled foreign substances and controlling the movement of water and ions, the alveolar epithelium acts as a physical barrier that defends against environmental assaults and helps to maintain the equilibrium of the alveolar surface fluid.
• The alveolar septum, which houses the pulmonary capillaries, divides nearby alveoli.
• The type I epithelial cell, a basement membrane, a varying quantity of interstitium, and the endothelial cell keep the capillary blood isolated from the air.
• Alveolar type I and type II cells are the two types of epithelial cells that make up the alveolar epithelium.
• About 95% of the alveolar surface is made up of type I cells, which are big, flat cells.

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