Login

Join for Free!
116899 members


How temperature affects diffusion

Discussion of all aspects of cellular structure, physiology and communication.

Moderator: BioTeam

How temperature affects diffusion

Postby mattmcgill » Sun Oct 16, 2005 1:39 am

I need to clear something up,

When a cell is placed into a hypertonic solution, does temperature at all affect diffussion? (or rate?)

Could be a stupid question, but any help is appreciated!
mattmcgill
Garter
Garter
 
Posts: 2
Joined: Sun Oct 16, 2005 1:22 am

Postby benny » Sun Oct 16, 2005 2:03 am

i'd say so. if the temp is higher, then probably it would increase the rate of diffusion by increasing the kinetic activity of the solution: the molecules within the solution would be moving about more vigorously and so naturally the chances of them moving through pores in a membrane would be much better. also everyone knows that when things heat up they expand. i guess this would be the case for a cell membrane. like a circle on the surface of a balloon. when you blow it up the circle expands. same goes for a pore in a cell membrane i guess. this seems intuitively correct, but if i'm wrong someone let me know.
"We have to ask ourselves the question: is our children learning?"

G.W. Bush, boob.
benny
Garter
Garter
 
Posts: 33
Joined: Tue Oct 04, 2005 2:03 pm
Location: adelaide, south australia

Postby mith » Sun Oct 16, 2005 2:08 am

Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN


Postby biocraz » Sun Oct 16, 2005 5:50 am

first of all, diffusion does not occur when a cell is placed in a hypertonic solution, only osmosis will occur.
Temperature will only affect the rate of diffusion due to the fast moving of the particles.
Rate of osmosis depends on the water potential in a particular solution or cell.
biocraz
Garter
Garter
 
Posts: 12
Joined: Sat Oct 15, 2005 5:54 pm

temperature and diffusion

Postby lara » Mon Oct 17, 2005 11:57 am

only till the equilibrium is attained.
lara
Coral
Coral
 
Posts: 131
Joined: Sun Sep 25, 2005 5:10 am

re:biocraz

Postby mattmcgill » Wed Oct 19, 2005 5:58 am

Biocraz,

Isn't osmosis a type of diffusion? I believe it is.
mattmcgill
Garter
Garter
 
Posts: 2
Joined: Sun Oct 16, 2005 1:22 am

Postby MrMistery » Wed Oct 19, 2005 5:49 pm

No, it's not. Google and you will see why.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby biohope » Wed Oct 19, 2005 5:58 pm

i thought they were the same...just osmosis had to do with water.
biohope
Garter
Garter
 
Posts: 6
Joined: Wed Oct 19, 2005 5:39 pm

Postby MrMistery » Wed Oct 19, 2005 6:08 pm

No they are not. Simple diffusion is the passing of small or/and hidrophobic molecules from one side of the plasma membrane to the other(from higher concentration to lower concentration). The process is influenced by heat and takes place in the lipid bilayer.

Osmosis is a different process, that consists on water moving from a more diluted solution towards a more concentrated one. The process is less influenced by heat because, although a bit of water can pass through the bilayer, the biggest quantity of water is moved by aquaporins. For their descovery, the Nobel prize was given in 2002.

Does that answer your question?
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby davidwood » Fri Nov 11, 2005 3:10 pm

helo could you please tell me what affects the rate of osmosis and how
davidwood
Garter
Garter
 
Posts: 2
Joined: Fri Nov 11, 2005 3:09 pm

Postby deafear30 » Wed Jan 17, 2007 12:52 pm

osmosis is a type of diffusion... oh and google it ...for sure. ^^
deafear30
Garter
Garter
 
Posts: 5
Joined: Fri Aug 18, 2006 6:07 pm

Postby Doc44 » Sun Jan 21, 2007 1:53 am

CONCENTRATE on hypertonic and hypotonic solutions.

Doc44

Solute
Doc44
Coral
Coral
 
Posts: 112
Joined: Sat Feb 25, 2006 2:53 am

Next

Return to Cell Biology

Who is online

Users browsing this forum: No registered users and 1 guest

cron