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crazzyjazzy crazzyjazzy
wrote...
14 years ago Edited: 14 years ago, crazzyjazzy
Describe how a eukaryotic cell can extrude calcium ions from the cytosol to the extracellular fluid?

This is what I am thinking:

So I know calcium concentration is kept low in the cytosol.

Would the Ca2+ ions just diffuse passively out of the cell?

or would the calcium be pumped out actively?

I dont know if I am going about this question the write way  Neutral Face
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#1
Educator
14 years ago
The inositol-phospholipid signaling pathway comes to mind.

hormone/signal binds to G-protein coupled receptor Rightwards Arrow activates phospholipase C Rightwards Arrow IP3 is formed -> it diffuses through the cytosol Rightwards Arrow activates calcium channel to release calcium ions in ER storage Rightwards Arrow triggers glycogen breakdown, vesicle release, and smooth muscle cells...

That's how the calcium concentration increases in a cell.
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