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Diffuses


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Best respiratory medium for oxygen?

If air is considered to be better as a respiratory medium than water because (among other reasons) it diffuses better in it (i.e. The air) why is a respiratory surface considered better if it is moist rather than dry (i.e. Covered in an appropriate thin layer of water) ?

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by Titanium27
Sun Mar 15, 2015 8:55 am
 
Forum: Human Biology
Topic: Best respiratory medium for oxygen?
Replies: 0
Views: 88

Diffusion and Fick's law

... be thought as relating to the difference in pressure of substance A between two arbitrary surfaces in the system during the time when substance A diffuses into substance B, so why isn't the temperature of the system a factor when considering the rate of diffusion?

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by Scotsgofree
Sat Oct 25, 2014 3:10 pm
 
Forum: Cell Biology
Topic: Diffusion and Fick's law
Replies: 1
Views: 1322

Neurons, Cocaine, and Shingles

... a) reduces the refractory period of neurons b) remains in the synapse longer than normal c) increases the speed of nerve impulse transmission d) diffuses rapidly throughout the pleasure centres of the brain 2. A hot foot results when a match is inserted in the side of a shoe and it lit. Very ...

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by homeworkdisaster
Sun Jun 10, 2012 8:11 pm
 
Forum: Human Biology
Topic: Neurons, Cocaine, and Shingles
Replies: 4
Views: 5392

Diffusion

... enters the lungs to be expelled. The movement of CO2 AND O2 across moiste respiratory surfaces takes place entirely by diffusion. A gas always diffuses from an area of high partial pressure to an area of lower partial pressure. Am I on the right track or does that seem too vague? For fish I ...

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by killian07
Mon Dec 12, 2011 4:23 am
 
Forum: General Discussion
Topic: Diffusion
Replies: 2
Views: 4133

Re: Urine formation

... of pores of the walls of the duct. Then, as the fluid in the collecting duct passes through the hyperosmotic region of the kidney medulla, water diffuses through the pores into the surounding interstitial fluid and is carried away by the blood circulation. The urine looses water and become more ...

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by chikis
Mon Nov 14, 2011 12:35 pm
 
Forum: Physiology
Topic: Urine formation
Replies: 7
Views: 8332
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