Question

1. What is the function of skeletal muscle?

2. Describe the major components of skeletal muscle cels:

• Myofibrils
• Sarcomeres
• Motor unit
• Neuromuscular junction

3. How does skeletal muscle produce movement?

4. How do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP and calcium play?

5. What is the functiion of the sarcoplasmic reticulum in muscle cell contraction?

6. Explain why calcium ions and ACh are vitals for muscle contraction.

7. What is a motor unit? Why does a rapid series of muscle twitches yield a stronger overall contraction than a single twitch?

8. What are the structural and functional differences between slow and fast muscle?

9. The__________and__________systems work together to move the body and specific body parts.

10. The 3 types of muscle tissue are:

11. Muscle fibers shorten when__________slides over__________

a. myosin, actin b. actin, myosin c. myoglobin, actin d. myosin, sarcomeres

12. The__________is the basic unit of muscle contraction.

a. myofibril b. sarcomere c. muscle fiber d. myosin filament

13. Skeletal muscle contraction requires__________

a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the above

14. Nerve impulses first stimulate a skeletal muscle fiber at___________

a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sites

15. Mention the muscles located in:

• Torax
• Abdomen
• Arms
• Legs
• Back
• Gluteus

Answer 1