I don't get what a concentration gradient is and what it does??

  • 0 votes

Please can someone help!?

Thanks :):)

Posted Mon 22nd April, 2013 @ 17:58 by :) PurpleJaguar (: - Team GR

9 Answers

  • 3 votes

The difference in concentration of a substance, across a membrane, is the concentration gradient,      i.e. the concentration on one side compared to the other. If the concentration on one side is high compared to the other side, there is a steep concentration gradient. But if the concentrations are only slightly different or pretty much the same, then the concentration gradient is small.

For diffusion, molecules always travel down the concentration gradient (from a high conc. to a low conc.) - just think of tea diffusing out of a teabag.

Active transport involves the carrier proteins and the use of ATP etc. which allows molecules to travel against their concentration gradient (from a low conc. to a high conc.) which cannot be done by simple diffusion.

Hope this helps!

Answered Tue 23rd April, 2013 @ 18:29 by Charlotte
  • 0 votes

In the case of diffusion, I think that the concentration gradient is the difference between the two concentrations in the two areas, which then effects the rate of the reaction, so the higher the concentration gradient, the higher the rate at which diffusion takes place?

-But obviously you might not be talking about diffusion, so this might not help... :P

Answered Tue 23rd April, 2013 @ 11:48 by Lara
  • 0 votes

In the case of diffusion, I think that the concentration gradient is the difference between the two concentrations in the two areas, which then effects the rate of the reaction, so the higher the concentration gradient, the higher the rate at which diffusion takes place?

-But obviously you might not be talking about diffusion, so this might not help... :P

Answered Tue 23rd April, 2013 @ 11:48 by Lara
  • 0 votes

In the case of diffusion, I think that the concentration gradient is the difference between the two concentrations in the two areas, which then effects the rate of the reaction, so the higher the concentration gradient, the higher the rate at which diffusion takes place?

-But obviously you might not be talking about diffusion, so this might not help... :P

Answered Tue 23rd April, 2013 @ 11:48 by Lara
  • 0 votes

In the case of diffusion, I think that the concentration gradient is the difference between the two concentrations in the two areas, which then effects the rate of the reaction, so the higher the concentration gradient, the higher the rate at which diffusion takes place?

-But obviously you might not be talking about diffusion, so this might not help... :P

Answered Tue 23rd April, 2013 @ 11:48 by Lara
  • 0 votes

In the case of diffusion, I think that the concentration gradient is the difference between the two concentrations in the two areas, which then effects the rate of the reaction, so the higher the concentration gradient, the higher the rate at which diffusion takes place?

-But obviously you might not be talking about diffusion, so this might not help... :P

Answered Tue 23rd April, 2013 @ 11:48 by Lara
  • 0 votes

Hiya

Thanks, I was talking about the conc gradients for active transport. Is what you have said the same for active transort?

Thanks 

:)

Answered Tue 23rd April, 2013 @ 16:38 by :) PurpleJaguar (: - Team GR
  • 0 votes

Thankyou sooo much Charlotte for your answer, it really helped me a lot

Thanks again :)

Answered Thu 25th April, 2013 @ 17:03 by :) PurpleJaguar (: - Team GR
  • 0 votes

No problem, glad I could help :)

Answered Thu 25th April, 2013 @ 20:49 by Charlotte