Exchange in alveoli, Biology

Assignment Help:

Exchange in Alveoli

The blood that enters the lungs from the heart has been routed through body tissue where mitochondria1 respiration has depleted its oxygen content. It thus has a low partial pressure of oxygen (Po2 = about 40 mm Hg). At the same time metabolic activity increases partial pressure of carbon dioxide in body tissue and partial pressure of carbon dioxide of blood entering the alveoli is 45 mm Hg. So compared to partial pressures in atmosphere blood entering lungs from the body tissue has low Po2 and high Pco2. The partial pressure of oxygen in alveoli is high and that of carbon dioxide is low so the gases diffuse only along their partial pressure gradient. The whole process of exchange is depicted in Figure.

74_Exchange in Alveoli.png

Figure: Exchange of respiratory gases in lungs and tissue cells. Numbers represent partial pressures in milli meters of mercury (mm Hg).


Related Discussions:- Exchange in alveoli

Post removal technique -roto-pro bur, Post removal Technique -Roto-pro bur ...

Post removal Technique -Roto-pro bur - Roto-pro bur is a taper bur having are six-sided, non-cutting flutes used a high-speed hand-piece around the circumference of the post t

Define the elimination of vitamin e, Define the Elimination of Vitamin E? ...

Define the Elimination of Vitamin E? The primary oxidation product of α-tocopherol is α-tocophery quinone that can be conjugated to yield the glucuronate. This glucnronide is e

How does refrigeration help to stop food from going bad, How does refrigera...

How does refrigeration help to stop food from going bad?   Western diets are often unhealthy due to they have too much sugar and fat, and not sufficient fibre.

Hormones secreted by parathyroid gland, Hormon e . The chief cells of the ...

Hormon e . The chief cells of the parathyroids secrete a hormone called parathyroid hormone (PTH) or parathormone or also called Collip's hormone after the name of its discove

Observing where soil bacteria live, Observing where soil bacteria live ...

Observing where soil bacteria live Dig up a clover, alfalfa or soy-bean plant. Carefully increase all the soil from the roots and see if you can find the little white nodules o

Objective of ecological study, The main objectives of study of ecology are:...

The main objectives of study of ecology are: (i)              To study the distribution of biota local and geographical level. (ii)             To study the interrelationship

Contrast the reproduction of bacteria with that of frogs, Contrast the repr...

Contrast the reproduction of bacteria with that of frogs. Bacteria replicate asexually by splitting in two. Frogs reproduce sexually by producing sperm and eggs. One sperm and

Acute myocardial infarction with haemodynamic deterioration, Acute Myocardi...

Acute Myocardial Infarction with Haemodynamic Deterioration :  These patients may require urgent insertion of intra aortic balloon pump (IABP) followed by PTCA or surgery. 50 per

Process of regeneration in planarians, Process of Regeneration in Planarian...

Process of Regeneration in Planarians Regeneration in planarians has been broadly studied and considerable information regarding this phenomenon is now available. Let us see w

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd