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Ion pumps

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Active transport

... membrane? Answer: on the side where the molecule is in lower concentration. COuld someone explain this please? Pumps are different from carrier proteins in that they use energy to move ions: (1 mark) a) ...

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by Nicolodn
Sat Sep 18, 2010 6:50 am
Forum: Cell Biology
Topic: Active transport
Replies: 1
Views: 3197

Ion uptake in freshwater teleosts?

From pgysiology it is well known that the concentration gradient of sodium and potassium ions across the cell membrane, determine ... the membrane of the body have powerful sodium-potassium pump that continualy pumps sodium ions to the outside and potassium ions to the inside of the cell. ...

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by anastasianikifor
Thu Aug 26, 2010 9:15 am
Forum: Physiology
Topic: Ion uptake in freshwater teleosts?
Replies: 2
Views: 6219

What is salt stress?

... in crabs is obtained by what methods, other than Sodium Potassium Ion Exchange Pumps and concentrated urine?

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by fastsandslash
Sat Jun 05, 2010 10:23 pm
Forum: Ecology
Topic: What is salt stress?
Replies: 8
Views: 19181

how does ATP work?

Hi emmabarrie, Answers to most of your questions can be found at http://www.atpsynthase.info/ "What kind of work can ATP ... the type of enzymes it binds to). Myosin uses ATP to make mechanical work; ion pumps use ATP to make transmembrane concentration gradients, etc.

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by Borisfen
Mon Feb 16, 2009 8:17 am
Forum: Cell Biology
Topic: how does ATP work?
Replies: 2
Views: 61682

Cell Membranes

... the only "holes" that are present in the cell membrane are ion channels, which have a tiny hydrophilic channel in the center that only ... ion. Other polar molecules pass through other passage proteins (pumps/permeases). Macromolecules (proteins, polynucleotides, polysaccharides) ...

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by MrMistery
Wed Jan 14, 2009 2:27 am
Forum: Cell Biology
Topic: Cell Membranes
Replies: 6
Views: 6481
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