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

Explain the term of measurement of height in veous pressure, Explain the te...

Explain the term of measurement of height in veous pressure? Measurement of Height: Measurement of height of venous pressure is done from the sternal angle of Louis verticall

Genetics, Ask question importance of genetics in human life #Minimum 100 w...

Ask question importance of genetics in human life #Minimum 100 words accepted#

Alcoholism, ALCOHOLISM - Continual heavy consuming of alcohol is cal...

ALCOHOLISM - Continual heavy consuming of alcohol is called alcoholism or drinking . Word alcohol is refered to C 2 H 5 OH or ethyl alcohol or ethanol or grain alcohol.

What is cyanosis, What is Cyanosis ? Cyanosis: Cyanosis may be peripher...

What is Cyanosis ? Cyanosis: Cyanosis may be peripheral or central. Peripheral cyanosis almost exclusively involves lips and extremities. Normal neonates may have bluish extrem

Diabetes mellitus in the world, Diabetes Mellitus in the World As per t...

Diabetes Mellitus in the World As per the International Diabetes Federation Directory, in 1994 the global burden of the disease was estimated at 110 million. These cases will i

How pathogenic bacteria cause diseases, What are some mechanisms by which p...

What are some mechanisms by which pathogenic bacteria cause diseases? Why is this knowledge important? Pathogenic bacteria have characteristics called as virulence factors that

Determine about the term - neuropsychology, Determine about the term - neur...

Determine about the term - neuropsychology The clinical practice of neuropsychology involves an integration of knowledge bases from the disciplines of psychology, psychometrics

Explain the different types of cells in cell structure , Explain the differ...

Explain the different types of cells in cell structure ? Types of Cells :  Cells can be classified as being either prokaryotic or eukaryotic depending on whether or not a mem

Food and diet, could you survive on a diet which contain no carbohydrates

could you survive on a diet which contain no carbohydrates

Sour taste, Sour taste is usually due to the presence of acids such as acet...

Sour taste is usually due to the presence of acids such as acetic acid, citric acid, benzoic acid. Upon dissociation, the acids give H ions which impart acidity. More the H ion con

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