Physiology of the muscles: The T Tubules

[Asmaa Mohammad]

Hi all,

My textbook says that the T tubules, which form an extensive network of transverse tubules that surround myofibrils, can carry the wave of action potential from the surface of the muscle fiber to the cell interior.

Could you help me understand the sentence in bold because I'm not sure I understand it well.

Thanks in advance!

 

[SciencewithDrJ]

Hi all,

My textbook says that the T tubules, which form an extensive network of transverse tubules that surround myofibrils, can carry the wave of action potential from the surface of the muscle fiber to the cell interior.

Could you help me understand the sentence in bold because I'm not sure I understand it well.

Thanks in advance!

This may help.
https://highered.mheducation.com/si...action_potentials_and_muscle_contraction.html

 

[Asmaa Mohammad]

@SciencewithDrJ
You say that the T tubules and the sarcoplasmic reticulum are what transfer the action potential between the different myofibrils?

 

[SciencewithDrJ]

Please look at the animation and try to figure out how the T tubule mediates the action potential. Action potential enters the neuron through the T-tubules.