"Pacemaker" is the one choice among the following choices given in the question that is the treatment that can also regulate heart rhythmsthat has replaced drugs in some cases. The correct option among all the options that are given in the question is the first option or option "A". I hope it helps you.
The answer is d.) tropomyosin will be moved out of the way and muscle contractions will not occur.
A half hour to an hour. It is called Duration.
