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Summary of Muscle Contraction – Sarcomere

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					Name:________________________ Class Period: __________ Date: _________________

                                                  Muscle Overview

Reference: Pgs. 288-294 in Holes Human Anatomy & Physiology

   1. Label the parts of the skeletal muscles below:
Name:________________________ Class Period: __________ Date: _________________



2. Describe the general structure of a skeletal muscle fiber.



3. Explain why skeletal muscle fibers appear striated (striped).



4. Label the detailed muscle filament diagram below:




5. What is a sarcomere? Draw the one from your book (Pg. 289) in the space below.




6. Label the muscle contraction diagrams below. Write the steps of muscle contraction below each diagram.
Name:________________________ Class Period: __________ Date: _________________

7. Explain how the filaments of a myofibril interact during muscle contraction.




8. Label each of the diagrams below as contraction or relaxation.




Reference: Pgs. 298-301 in Holes Human Anatomy & Physiology

9. Define threshold stimulus.



10. What is an all-or-none response?



11. Distinguish between a twitch and a sustained contraction.



12. Define muscle tone.

				
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