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Concentration gradient

Definition

noun

1. a gradual change in the concentration of solutes in a solution as a function of distance through a solution.

2. the gradual difference in the concentration of solutes in a solution between two regions. In biology, a gradient results from an unequal distribution of ions across the cell membrane. When this happens, solutes move along a concentration gradient. This kind of movement is called diffusion.


Supplement

The movement of solutes along a concentration gradient is common in many biological processes. For a more elaborated discussion, read the Tutorial in Cell Biology where various ways substances pass through a cell membrane are described.

See also: diffusion, solute, solution


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Re: Diffusion and concentration gradient

1) the answer of Arlen1991 is completely irrelevant to your question! 2) Darby's analogy is perfect 3) it's simply about entropy . The molecules move randomly in any direction without any knowledge of presence of other molecules (alike or different). So just by following probability they spread rand...

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by JackBean
Thu Dec 26, 2013 5:49 pm
 
Forum: General Discussion
Topic: Diffusion and concentration gradient
Replies: 7
Views: 5126

Re: Diffusion and concentration gradient

I don't see the problem. It's all about net movement in each direction. If there is more O2 in region A than in region B, there will be more movement of O2 from A to B than from B to A. After all, O2 can't diffuse out of region B if it isn't already present in region B. If B is filled with mostly CO...

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by wildfunguy
Thu Dec 19, 2013 12:51 am
 
Forum: General Discussion
Topic: Diffusion and concentration gradient
Replies: 7
Views: 5126

Diffusion and concentration gradient

... have been working on the respiratory system and once more this involved concentration gradients. I more or less understand how it works by now (it's been mentioned a lot in other ...

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by Aymeric
Sun Dec 15, 2013 1:02 am
 
Forum: General Discussion
Topic: Diffusion and concentration gradient
Replies: 7
Views: 5126

I need some help understanding mitochondria

... of proteins is in mitochondria, it's not like RuBISCO in plant cells. Concentration gradient is gradient of concentration. If you do not understand to any of these words, look ...

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by JackBean
Sat Oct 06, 2012 9:53 pm
 
Forum: Cell Biology
Topic: I need some help understanding mitochondria
Replies: 1
Views: 3681

I need some help understanding mitochondria

... Why & how do ATP synthase in the inner membrane and use the concentration gradient to produce ATP? and what is a concentration gradient? What is an electron transport ...

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by fightclub
Sat Oct 06, 2012 8:44 pm
 
Forum: Cell Biology
Topic: I need some help understanding mitochondria
Replies: 1
Views: 3681
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