Download CH 9 Test Review

A & P CH. 9 Muscles & Muscle Tissue Test Study Guide
1. Be able to identify the following from Figure 9.2 p. 283 and Figure 9.3 p. 285:
a. Endomysium
f. I band
b. Fascicle
g. H zone
c. Epimysium
h. A band
d. Perimysium
i. Z disc
e. Muscle Fiber
j. M line
+2
Ca ion
2. What is role of Ca+2 ion in muscle contraction?
3. What does Ca+2 ion bind to in skeletal muscle cells?
4. What is the network of membranes in skeletal muscle cells that stores Ca+2 ion?
5. What happens to the Ca+2 ion level in the cytoplasm after nervous stimulation
has ceased?
The Myofilaments
6. What are the “thick” and “thin” fliaments?
7. What causes the striped appearance (striations) in skeletal muscle?
8. During Contraction, where do the myosin attach?
9. Using figure 9.3 p. 285 and answer the following:
a. The sarcomere is found between…
b. Which band contains only actin?
c. Which band contains BOTH actin & myosin?
d. Which band contains myosin?
10. What does the sliding filament model of contraction involve?
11. As a muscle fiber contracts, which bands (fig. 9.3) diminish in size? Disappear?
Move closer but do not diminish?
Microscopic Anatomy of a Skeletal Muscle Fiber
12. What is the function of myoglobin?
13. What is a sarcomere?
14. What is the major function of the sarcoplasmic reticulum?
15. What is the functional role of the T tubules?
16. What is stored in the terminal cisternae?
17. What is another name for the muscle cell membrane?
Gross Anatomy of a Skeletal Muscle
18. What does each connective tissue sheath cover?
19. How many nerves serve a muscle cell? How is this different than smooth &
cardiac muscle?
Overview and Functional Characteristics & Muscle Functions
20. What are the prefixes that refer to muscles?
21. What are the four important functions of muscle tissue?
A & P CH. 9 Muscles & Muscle Tissue Test Study Guide
22. What are the four special functional properties of muscle tissue?
23. What is the most distinguishing characteristic of muscle tissue?
Physiology of a Skeletal Muscle Fiber
24. Once a motor neuron has fired, do all the muscle fibers contract?
25. What is acetylcholine and acetylcholinesterase? Why are they important, what
do they do at the neuromuscular junction?
26. What causes a resting potential? Hint…p. 81-82
27. Why does rigor mortis occur?
And… just a couple from CH 10
28. How do the terms origin and insertion relate to interactions of skeletal muscles in
the body (CH 10)?
29. What does the term aponeurosis refer to?