Mr. HunterAnatomy and Physiology12/04/12Student Structured Notes Chapter 7 Muscular System pg. 145-149

NAME_______________________ DATE____________ Per # _____ Points / 22

1. What is the name of the type of muscle contraction that allows us to maintain our posture?

2. Briefly describe this type of contraction.

3. What functions do muscles serve when gravity tends to pull the head and trunk downward?

4. Healthy survival depends on our body’s ability to maintain a constant ________

5. What is hypothermia and what harm does it have on the body?

6. Where does most heat to maintain a constant body temperature originate from?

7. Where is energy obtained to produce a muscle contraction?

8. What happens to body temperature during periods of generating ATP for heavy muscle use?

9. Describe the physiology of muscle fatigue.

10. What happens to the body’s supply of ATP during exercise?

11. What two components in the muscle’s blood supply help to regenerate ATP?

12. When oxygen supplies run low, what will muscles cells do to continue to perform?

13. What compound is produced that may produce a burning sensation in muscles during long periods of exercise?

14. What does the term oxygen debt describe?

15. Read the Health and Well-Being section on pg. 147. Briefly describe the three different types of muscle fibers- slow, fast and intermediate.

16. Explain briefly with examples how other systems of the body are involved in producing normal skeletal movement.

17. What fiber must muscles cells be stimulated by before they can cause skeletal movement?

18. What is the point of contact between a nerve ending and a muscle?

19. What chemicals are released by motor neurons that generate events within the muscle that causes it to contract?

20. Define threshold stimulus and “all or none response”

Review Question(s)

1. Explain why the individual fibers in the biceps brachii muscle respond to an “all or none” response but the entire muscle does not? ________________________________________________________________________________________________________________________________________________________________________________________ _________________________________________________________________________ __________________________________________________________________________

2. Explain why “white muscle fibers” are physiologically suited for quick, powerful contractions?_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________