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

Define energy requirements for underweight, Define Energy requirements for ...

Define Energy requirements for Underweight? The total calorie intake should be 500 to 1000 Kcal in excess of the daily needs in order to result a gain in weight by half to one

What is the main biological process, Q. What is the main biological process...

Q. What is the main biological process that consumes carbon dioxide? The major biological process that consumes carbon dioxide is photosynthesis.

Adaptive Radiations, Adaptive Radiations The organisms all the time te...

Adaptive Radiations The organisms all the time tend to establish harmony with their environment. This process, called adaptation, enables the organism to face the vagaries of

How drug intolerance in tuberculosis, Drug Intolerance For patients wh...

Drug Intolerance For patients who cannot tolerate rifampin, alternative regimens include 9-12 months of isoniazid, ethambutol and pyrazinamide, with or without a fluoroquinolo

What are social dangers, Members belonging to the scientific community fear...

Members belonging to the scientific community fear the misuse of this therapy leading to dangerous consequences.  People may try to insert the desired gene, for example, the gene f

Tissue Cells, How is an Epithelial cell made?

How is an Epithelial cell made?

Compute how much of the absorbance of the bsa, For a sample containing both...

For a sample containing both protein and nucleic acid, the absorbance measured at a particular wavelength will be the sum of contributions from both types of molecule. Using the pr

Genetic resources of biodiversity, Q. Genetic resources of biodiversity? ...

Q. Genetic resources of biodiversity? Genetic diversity or the gene pools are important for promoting and ensuring high agricultural yield. Genetic diversity provides crops wit

Explain about oligomeric enzymes, Oligomeric enzymes Oligomeric protein...

Oligomeric enzymes Oligomeric proteins consist of two or more polypeptide chains, which are usually linked to each other by non-covalent interactions and never by peptide bonds

Determination of the age of fossil, DETERMIN A TIO N OF THE AGE OF FOSSI...

DETERMIN A TIO N OF THE AGE OF FOSSIL - Radioactive clock (Boltwood -1907) - Half life of uranium is 4.5 billion years. This means half of total uranium disintegrates

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