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PRACTICE QUIZ
CHAPTER 9
1. Name the connective tissue that surrounds each fascicle. ________________________________________
2. Name the contractile unit of a myofibril. ____________________________________________________
3. Name the scientific term for the cytoplasm of a muscle cell. _____________________________________
4. Name the type of muscle tissue characterized as involuntary, single-ovoid nuclei, slow twitch, and spindleshaped fibers. __________________________________________________________________________
5. Name the neurotransmitter that is associated with the induction of a muscle contraction. _______________
6. Name the ion that must enter the axon in order for the neuron to releases its neurotransmitters. __________
7. Name the cation that crosses the cell membrane of the muscle cell during the depolarization reaction just
before a muscle contracts. _________________________________________________________________
8. Name the area of a sarcomere where you would find only the actin filaments. ________________________
9. Name the area of the sarcomere where you get overlapping actin and myosin filaments. ________________
10. According to the sliding filament theory, the release of ___________________ causes the myosin heads to bend
and pull on the actin fibers.
11. Type of muscle tone/contraction where the muscle contracts but does not shorten. ____________________
12. Name the indirect attachment of muscle to bone or even muscle to muscle. __________________________
13. Name the scientific term for the inability of myosin to detach from the actin fibers. ___________________
14. Name the type of respiration that produces the most ATP. _________________
15. Name the toxic substance that is produced by muscle cells when they attempt to do work without the presence
of oxygen (anaerobic). ____________________________________________________________
16. The movement of K+ ions across the muscle cell membrane causes ________________ of the sarcolemma.
17. Name the gap or space between the axon and the muscle cell that it innervates. ______________________
18. Name a function (other than support) of muscle tissue. __________________________________________
19. Name the individual components of a fascicle. ________________________________________________
20. Name the term referring to a long, sustained muscle contraction. __________________________________
21. Name the type of filament that forms thick fibers. ______________________________________________
22. Name the enzyme that breaks down acetylcholine. _____________________________________________
23. The characteristic of a muscle that allows it to return to its normal shape after stretching is ________________.
24. __________________________ are specialized structures of cardiac muscle that allow transmission of impulses
to contract from one cell to another.
25. Sarcomeres of smooth muscle attach at _________________________.
26. Name the type of muscle tissue that does not contain t-tubles. ________________________________
27. ____________________________ is a disorder characterized by a reduction in acetylcholine receptors.
28. _______________________ muscle has the fastest contraction time.
29. ___________________ muscle does not have gap junctions between muscle cells.
30. The terminal cisternae of the sarcoplasmic reticulum are used to store which ion? ______________________
31. According to the sliding filament model, calcium ions bind to _______________________, causing the
_______________ move, thus allowing the myosin head to attach to the actin filament.
Answers:
1. Perimysium
2. Sarcomere
3. Sarcoplasm
4. Smooth
5. Acetylcholine
6. Ca+
7. Na+
8. I band
9. A band
10. ADP and Pi
11. Isometric
12. Tendon, Aponeurosis
13. Rigor mortis
14. Aerobic
15. Lactic acid
16. Repolarization
17. Synapse
18. Movement, heat production, posture, joint stabilization
19. Muscle fibers
20. Tetanus
21. Myosin
22. Acetylcholinesterase
23. Elasticity
24. Intercalated discs
25. Dense bodies
26. Smooth
27. Myasthenia gravis
28. Skeletal
29. Skeletal
30. Ca+
31. Troponin, tropomyosin