Question
An action potential enters the depths of a muscle fiber by way of _________blank.
Multiple Choice
the sarcoplasmic reticulum
the calcium ion channels
the T tubules
the actin myofilament
diffusion
Multiple Choice
the sarcoplasmic reticulum
the calcium ion channels
the T tubules
the actin myofilament
diffusion
Answers
Answered by
GPT-4o mini
An action potential enters the depths of a muscle fiber by way of **the T tubules**.