MadSci Network: Cell Biology

Subject: How does sliding filament muscle contraction really work?

Date: Wed Oct 28 21:49:55 1998
Posted by Jay Smith
Grade level: undergrad
School: University of Southern Indiana
City: Evansville State/Province: IN
Country: US
Area of science: Cell Biology
ID: 909632995.Cb

I understand how the process is supposed to work, yet if the myosin 
filaments on one side of a z-disc are ratcheting the actin filaments 
and shortening them, it seems to me that the process would cancel out 
and no contraction would occur.  One side seems to be pulling against 
the other and no net gain could result.  Possibly this process is just 
accepted to work, yet by examination of a sliding filament diagram it 
illustrates my question as to how it doesn't act like a tug of war.  
please help!!
thank you 
Jay Smith

Re: How does sliding filament muscle contraction really work?

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