Need help with Skeletal Muscle Physiology Exercise 2

PhysioEX Review Sheet (Exercise 2)
SKELETAL MUSCLE PHYSIOLOGY

Electrical Stimulation
In Activity 2, how long was the latent period? __msec

Describe the chemical changes that are occuring during this period.

The Graded Muscle Response to Increased Stimulus Intensity[/u]
From Activity 3, describe the effect of increasing the voltage. What happened to the force generated and why did this change occur?

4. How does thi change occur in vivo?

10. For Activity 6, explain how you were able to acheive smooth contraction at a given force level.

11. In Activity 7, explain why the force of the muscle decreaed over time during uninterrupted stimulation. Describe the mutiple causes of this phenomenon which occurs in vivo with prolonged use of a musce.

Isotonic Contraction
16. In Activity 9, which weight resulted in the highest initial vlocity of shortening?

17. Explain the relationship between the amount of resistance and the initial velocity of shortening.

18. Explain why it will take you longer to perform 10 repetition lfting a 20-pound weight than it would to perform the same numer of repetition with a 5 pound weight.

Thanks for your assistance