PhysioEx 9.0 Exercise 2 ACTIVITY questions

Activity 2:
1. For a single skeletal muscle twitch, explain the effect of increasing stimulus voltage.
2. How is this effect achieved in vivo?

Activity 3:
2. What changes are thought to occur in the skeletal muscle to allow treppe to be observed?

Activity 4:
1. Explain what you think is being summated in the skeletal muscle to allow a high stimulus frequency to induce a smooth, continuous skeletal muscle contraction.
2. Why do many toddlers receive a tetanus shot (and then subsequent booster shots, as needed, later in life)?  How does the condition know as "lockjaw" relate to tetanus shots?

Activity 6:
 Explain what happens in the skeletal muscle sacromere to result in the changes in active, passive, and total force when the resting muscle length is changed?