Question

17. In order for oxygen in the inspired air to reach hemoglobin, it must diffuse across all of the
following structures, except:

A) layer of surfactant

B) an endothelial cell

C) a type I pneumocyte

D) the plasma membrane of the erythrocyte

E) one or two smooth muscle cells​

Answer 1

Answer:

Option E.

In order for oxygen in the inspired air to reach hemoglobin, it must diffuse across all of the  following structures, except: one or two smooth muscle cells.​

Explanation:

• In the process of oxygen reaching hemoglobin it gets diffused across layer of surfactant,  an endothelial cell, type I pneumocyte, and the plasma membrane of the erythrocyte.

• The molecule that is responsible for the carrying of oxygen into the blood cells is protein hemoglobin.

• The normal adult human's blood is the mixture of six different species of hemoglobin molecules. These all molecules consist of same function as well as structure.