Layers Through Which Gases Must Diffuse in External Respiration Include

question 5

Multiple Choice

Layers through which gases must diffuse in external respiration include those listed below.What is the correct sequence of these layers for oxygen diffusion in external respiration?
1) basement membrane of capillary epithelium
2) epithelium of alveolar wall
3) interstitial space
4) thin layer of fluid lining the alveolus
5) basement membrane of alveolar epithelium
6) epithelium of capillary wall

• A) 2, 5, 4, 3, 1, 6
• B) 5, 2, 4, 3, 6, 1
• C) 6, 1, 3, 5, 2, 1
• D) 4, 2, 5, 3, 1, 6
• E) 6, 1, 3, 4, 2, 5

---

Definitions:

Diploid

A cell or organism that has two sets of chromosomes, one from each parent, typical of somatic cells.

Chromosome Type

Refers to the classification of chromosomes based on structure and function within a cell, important for genetic inheritance.

Replication Error

Mistakes that occur during DNA replication, potentially leading to mutations or genetic variations.

Mutation

A change in the DNA sequence that can lead to differences in physical appearance, function, or behavior.