Question

what is the minimum number of plasma membrane that oxygen has to diffuse across to pass from air in the alveoli to haemoglobin inside a r.b.c.? a. two b. three c. four d. five

Answer 1

Oxygen has to diffuse across three plasma membrane to pass from air in the alveoli to hemoglobin inside the red blood corpuscles.

Explanation:

• The first layer is the the pneumocyte plasma membrane layer which is formed by the alveolar tissue. The next layer is formed by the endothelial layer of the blood vessel when the haemoglobin is present.

• The third layer is a basement membrane through which oxygen enters the red blood cells and reacts with haemoglobin to form oxyhaemoglobin by which it can be transported from one part of the body to the other part of the body.

To know more about diffusion of gases in lungs,

Diffusion boundary of alveoli is formed by which tissue - Brainly.in

https://brainly.in/question/8512238

Answer 2

Answer:

5 is correct answer

Explanation:

2 plasma membrane of Squamous epithelium of alveoli (1 during entry & other at exit),2 plasma membrane of endothelium layer of blood capillary (1 during entry & other at exit) & 1 plasma membrane of RBC cell at time of entry then O2 mices with haemoglobin so total 5 plasma membrane..pls note dont consider basement substance as plasma membrane as it ls layer.

Hope everyone understands it..