The function of the T tubules in muscle contraction is to a. make and store glycogen, b. release Ca²⁺ into the cell interior and then pick it up again, c. transmit the action potential deep into the muscle cells, d. form proteins.

Video transcript

Hey, everyone. Let's take a look at this question together. Which of the following is a consequence of blocked T tubules. Is it answer choice? A, an increase in the force generated by the muscle fiber? Answer choice B A decrease in the force generated by the muscle fiber. Answer choice C an increase in the number of A T P generated by the muscle fiber or answer choice D A reduction in the number of fales in the muscle tissues. Let's work this problem out together to try to figure out which of the following answer choices is a consequence of blocked T tubules. So in order to determine what would happen if we block the T tubules, we have to recall what we've learned about what the T two bles are. And we note that the T tubules work to help transmit the action potentials to the cell. So what would be a consequence if we blocked those T tubules? Well, the blocking of those T tubules would interfere with the transmission of that action potential to the cell as well as interfere with the release of the calcium ions. And as a result of this, we would end up with a decrease in the force that is generated by those T tubules that are blocked compared to the T tubules that are not blocked. Which means that answer choice B A decrease in the force generated by the muscle fiber is the correct answer. Since those T tubules work to help transmit the action potentials to the cell. And the blocking of those T tubules would interfere with the transmission of the action potential as well as the release of the calcium ions which would lead to a decrease in the force generated by that muscle fiber. So answer choice B is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.