Skeletal muscle has a defined contraction period, causing thefull contraction of every stimulated fiber. (8 pts)
Part 1 - What determines the length of time during which thefiber contracts?
Part 2 - What ends the contraction, so relaxation can begin?(not including the termination of the NMJ stimulation)
Part 3 - Taking the previous two parts, and now adding in thatthe NMJ has stopped inducing depolarizations at the motor endplate, describe the events as the contraction cycle (each singletwitch) ends.
Part 4 - Taking the previous three parts, and now adding in thatthe NMJ continues to induce depolarizations at the motor end plate,explain the generation of increased muscle tension as summationoccurs.
