Physiogrip Pre-Lab Questions

Pre-Lab Questions: PhysioGrip Answer the following questions and submit (for points) at the start of the lab session. Starting from Page 40 of Physiology Lab Manual:

1. In Lab Ex 1, the 3 periods of a muscle twitch: ______, ______and ______periods.

2. What is a latent period? ______.

3. Typically, what is the duration of a latent period in mammals? ______,

4. Describe isometric contractions. ______.

5. Describe isotonic contractions. ______.

6. A motor unit consists of (p42)?______.

7. Do all motor units have the same sensitivity? ______.

8. Typically, ______motor units are more sensitive than ______motor units.

9. In spatial summation: ______.

10. In the Lab Exercises, which muscle is stimulated by the apparatus? ______.

11. In Lab Exercise 2, what parameter is going to be increased (underlined!)? ______.

12. The stimulator frequency should be set to: ______and the duration should be set to: ______.

13. In Lab Ex. 3, temporal summation is brought about by ______.

14. If muscle is stimulated at very high frequency, ______will ensue.

15. Asynchronously, in terms of muscle contraction, means what? ______.

16. In Lab Ex. 3 (procedure 5), what parameter is gradually increased? ______.

17. In Lab Ex. 4, which muscles will be tested for fatigue? ______.

18. Muscle fatigue can be caused by: ______.

19. How will blood flow be restricted to flexor muscles? ______.

20. Should the order in which 4a and 4 b are done be varied? ______. Why or why not?