<p> 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:</p><p>1. In Lab Ex 1, the 3 periods of a muscle twitch: ______, ______and ______periods.</p><p>2. What is a latent period? ______.</p><p>3. Typically, what is the duration of a latent period in mammals? ______,</p><p>4. Describe isometric contractions. ______.</p><p>5. Describe isotonic contractions. ______.</p><p>6. A motor unit consists of (p42)?______.</p><p>7. Do all motor units have the same sensitivity? ______.</p><p>8. Typically, ______motor units are more sensitive than ______motor units. </p><p>9. In spatial summation: ______.</p><p>10. In the Lab Exercises, which muscle is stimulated by the apparatus? ______.</p><p>11. In Lab Exercise 2, what parameter is going to be increased (underlined!)? ______.</p><p>12. The stimulator frequency should be set to: ______and the duration should be set to: ______.</p><p>13. In Lab Ex. 3, temporal summation is brought about by ______.</p><p>14. If muscle is stimulated at very high frequency, ______will ensue.</p><p>15. Asynchronously, in terms of muscle contraction, means what? ______.</p><p>16. In Lab Ex. 3 (procedure 5), what parameter is gradually increased? ______.</p><p>17. In Lab Ex. 4, which muscles will be tested for fatigue? ______.</p><p>18. Muscle fatigue can be caused by: ______.</p><p>19. How will blood flow be restricted to flexor muscles? ______.</p><p>20. Should the order in which 4a and 4 b are done be varied? ______. Why or why not? </p>