There was no bonus item in this version, but during the final challenge, the team could find money bags worth $1,000 each; however, the team could only keep the additional money if they completed the task and returned to the Hellevator in time. In this version of the Labyrinth, there was a total of $25,000 available.
Lab #9: Muscle Physiology p.3 Muscle Twitch Parameters A twitch is a muscle contraction that occurs in response to a single, rapid stimulus that evokes a single, isolated action potential in a muscle fiber.
Let's take a look at what occurs within a skeletal muscle, from excitation to contraction to relaxation 1  : An electrical signal (action potential) travels down a nerve cell, causing it to release a chemical message (neurotransmitter) into a small gap between the nerve cell and muscle cell.