Dictionary » P » Potential gradient

Potential gradient

Definition

noun

(1) The local space rate of change of the potential with respect to displacement.

(2) The net difference in electric charge across a cell membrane.


Supplement

Word origin: potential: from Late Latin potentiālis, powerful, from Latin potentia, power; gradient: from Latin gradiens, present participle of gradior (“‘to step, to walk’”).

Synonym: electric gradient.


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Heavy metals, can anyone answer?

... within the body, such as in the nerves, but in those cases it is the gradient (potential) that is important and not the absolute numbers of ions (above a certain minimum). ...

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by AstraSequi
Wed Apr 11, 2012 12:07 am
 
Forum: Human Biology
Topic: Heavy metals, can anyone answer?
Replies: 11
Views: 7259

Diffusion

... current flow of water and blood that maintains a partial pressure gradient down which 02 diffuses from water into the blood. For Angiosperms....This ... This is passive transport requiring no energy. Gradients of water potential drive the osmotic movement of water from cell to cell within root ...

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by killian07
Mon Dec 12, 2011 4:23 am
 
Forum: General Discussion
Topic: Diffusion
Replies: 2
Views: 3467

Apoplast, Symplast

... and plasmodesmata. Water moves along the root by osmosis down a water potential gradient (as water moves into one cell, this cell then has a higher water potential than the ...

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by magicsiew
Thu Jun 30, 2011 7:19 am
 
Forum: Cell Biology
Topic: Apoplast, Symplast
Replies: 1
Views: 9360

Entropy, potential energy and energy transduction

... the relevant chemicals involved in the activities etc e.g. excretion : Potential energy : ATP in the body is required to power the excretion machinery. ... example would be the nephrons and kidneys especially the osmolarity gradient created. Transduction : discuss the actions of ATP on the sodium/potassium ...

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by mith
Thu May 26, 2011 10:46 pm
 
Forum: Molecular Biology
Topic: Entropy, potential energy and energy transduction
Replies: 2
Views: 3624

Na,K-ATPase as a pump. Request for Reference(s)

... from the mother liquor, Na+ starts to leave them down the chemical potential gradient. The type of experiment discussed shows us only one thing: Na+ leaves control vesicles ...

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by Vladimir Matveev
Wed Jan 05, 2011 9:08 am
 
Forum: Cell Biology
Topic: Na,K-ATPase as a pump. Request for Reference(s)
Replies: 8
Views: 6107
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