Skeletal Muscle Physiology PhysioEX

Please i need help for my lab review. I would really appreciate any help.

Skeletal Muscle Physiology
1. Define each of the following terms:
•motor unit
• twitch
• threshold
• treppe
• summation
• tetanus
.fatigue
 •isometric contraction
 •isotonic contraction
2. Describe the process of excitation-contraction coupling.

3. What is the role of acetyl choline in a muscle contraction?

28   Review Sheet 2

4. Describe the three phases of amuscle“twitch.”

5. What could be a chemical cause of fatique?

6. In fatigue, what could happen in force production over time?

7.  If you were lifting a dumbbell,would your muscles be contracting isometrically orisotonically?

8. What is the key variable in an isometric contraction?

9. Define the term maximal stimulus.

10. What has happened in the muscle when the maximal stimulus is achieved?

11. What is the difference between stimulus intensity and stimulus frequency?

12. Circle the correct bold faced term. At the threshold stimulus, sodium ions start to move into / out of the cell to bring about the membrane depolarization.