Calcium ions and muscle fibers

[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.

 

Peace,

Justin

[Krul]

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.

[AL]

 

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.