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Guest Powel6016

Calcium ions and muscle fibers

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Guest Powel6016

Hey,

 

What happens when adequate ATP is present within the muscle fiber, but action potentials occur at a frequency so great that calcium ions are not transported back into the sarcoplasmic reticulum between individual action potentials?

 

 

Please help, anything would be helpful. This is for my anatomy class. :eek:

 

Peace,

Justin

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Ca 2+ ions are vital for the contraction of muscles, without these ions the muscle can't contract. So what would happen is nothing I think.

 

Although I am not completely sure, I do not believe that there will be any negative effects, beside the muscle not contracting.

 

P.S.

 

Hypocalciëmy ( too little calcium ) is known to cause hartritme disorders.

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What happens when adequate ATP is present within the muscle fiber, but action potentials occur at a frequency so great that calcium ions are not transported back into the sarcoplasmic reticulum between individual action potentials?

 

That sounds like the definition of summation. Well, either that or tetany. I always get the two confused. I don't have a physiology textbook anymore, but I'm pretty sure it's one of those two.

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