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Lecture Objective

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Lecture 11 objectives

1. Describe, contrast and explain the response of a single muscle fiber and a whole muscle to electrical stimulation - define the threshold stimulus and the all-or-none phenomenon.

2. Define a motor unit and describe how motor units are important in controlling the force and rate of muscle contraction.

3. Explain what is meant by recruitment of motor units.

4. Explain what is meant by muscle tone, and how it relates to posture and maintaining balance.

5. Explain the staircase effect.

6. Define tetanic contraction, and distinguish it from a twitch.

7. Distinguish between isotonic and isometric contractions, and give examples.

8. Describe the two ways in which smooth muscle is organized, and describe their functions.

9. Describe how the mechanism of smooth muscle contraction differs from that of skeletal muscle.

10. List four factors that control smooth muscle contractions.

11. Summarize in a table the similarities and differences between skeletal, smooth, and cardiac muscle.

12. Explain the ways in which different groups of skeletal muscles(agonists, etc.) interact to produce smooth, coordinated movements.

13. Describe with diagrams what is meant by a first class lever, and give examples.

14. Describe with diagrams what is meant by a third class lever, and give examples.

15....

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