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Name: ___________________________
Period: ______
Anatomy & Physiology Exam
Muscular System
Using Figure 6.1, match the following:
1) The I band within a skeletal muscle fiber is indicated by ________.
A) Label A
B) Label B
C) Label C
D) Label D
2) The A band within a skeletal muscle fiber is indicated by ________.
A) Label A
B) Label B
C) Label C
D) Label D
3) The H zone, located within the A band, lacks thin filaments and is represented by ________.
A) Label A
B) Label B
C) Label C
D) Label D
4) The myofilament composed of actin is indicated by ________.
A) Label A
B) Label B
C) Label C
D) Label D
Using Figure 6.2, match the following:
5) The epimysium is represented by ________.
A) Label A
B) Label B
C) Label C
D) Label D
6) The perimysium wraps a fascicle of muscle cells and is represented by ________.
A) Label A
B) Label B
C) Label C
D) Label D
7) The muscle fiber (cell) is indicated by ________.
A) Label A
B) Label B
C) Label C
D) Label D
8) The endomysium that wraps individual muscle fibers is indicated by ________.
A) Label A
B) Label B
C) Label C
D) Label D
9) Striated involuntary muscle tissue is classified as ________ muscle.
A) skeletal
B) cardiac
C) smooth
D) either smooth or skeletal
10) Muscle tissue has the ability to shorten when adequately stimulated, a characteristic known
as ________.
A) elasticity
B) irritability
C) contractility
D) extensibility
11) When a skeletal muscle is fully contracted, the ________ are closer to the thick filaments.
A) Z discs
B) M lines
C) cross bridges
D) A bands
12) A smooth, sustained contraction is called ________.
A) fused, or complete, tetanus
B) a twitch
C) unfused, or incomplete, tetanus
D) summing of contractions
13) An inherited disease that causes muscles to degenerate and atrophy is known as ________.
A) Fibrodysplasia
B) muscular dystrophy
C) cystic fibrosis
D) myasthenia gravis
14) Striated involuntary muscle tissue found in the heart is ________.
A) smooth muscle
B) skeletal muscle
C) dense regular
D) cardiac muscle
E) dense irregular
15) Endomysium covers ________.
A) fascicles of muscle cells
B) an entire muscle
C) an individual muscle cell
D) myofibrils
16) The plasma membrane of a skeletal muscle cell is called the ________.
A) sarcolemma
B) sarcomere
C) myofilament
D) sarcoplasmic reticulum
17) Smooth muscle cells are ________.
A) multinucleate
B) involuntary
C) branched
D) striated
18) Which type of muscle tissue contracts most quickly upon stimulation?
A) skeletal
B) visceral
C) cardiac
D) smooth
19) Which of the following is a function of the muscular system?
A) hematopoiesis
B) ossification
C) storage of energy as fat
D) generation of heat
20) A sarcomere is ________.
A) the nonfunctional unit of skeletal muscle
B) the contractile unit between two Z discs
C) the area between two intercalated discs
D) the wavy lines on the cell, as seen in a microscope
21) Which one of the following is composed of myosin protein?
A) thick filaments
B) thin filaments
C) all myofilaments
D) Z discs
22) During skeletal muscle contraction, myosin heads attach to binding sites associated with
________.
A) myosin filaments
B) actin filaments
C) Z discs
D) thick filaments
23) Which of the following can actually shorten during a muscle contraction?
A) myosin filament
B) A band
C) actin filament
D) sarcomere
24) A skeletal muscle twitch differs from a tetanic contraction in that ________.
A) the muscle twitch is a brief and "jerky" movement, while the tetanic contraction is prolonged
and continuous
B) the tetanic contraction is caused by a single stimulus, while the twitch is caused by very rapid
multiple stimuli
C) the muscle twitch is prolonged and continuous while a tetanic contraction is brief and "jerky"
D) the muscle twitch occurs only in small muscles while a tetanic contraction occurs in large
muscle groups
25) The movement opposite to abduction is ________.
A) flexion
B) rotation
C) circumduction
D) adduction
26) While doing "jumping jacks" during an exercise class, your arms and legs move laterally
away from the midline of your body. This motion is called ________.
A) extension
B) flexion
C) abduction
D) adduction
27. Which of the following disease causes the neuromuscular junction to breakdown?
A) Muscular dystrophy
B) Ossification
C) Myasthenia Gravis
D) Fibrodysplasia
Match the following:
A) smooth muscle tissue
B) skeletal muscle tissue
C) cardiac muscle tissue
28) Voluntary muscle tissue
29) Muscle tissue found only in the heart
30) Muscle tissue where contraction occur in the gut or other visceral organs
31) Muscle tissue that is multinucleate
32) Muscle tissue composed of branching cells and intercalated discs
33) Muscle tissue that activates arrector pili muscles to stand hairs on end
34) Performs very slow, sometimes rhythmic, contractions
35) Muscle tissue that maintains posture, body position, and stabilizes joints
Answer the following open ended questions using complete sentences. (30 points)
36) Explain the 4 main function of the Muscular System and their importance in everyday life.
(4 points)
37) Explain how the different types of body movements differ from each other and give
examples for each type. (5 points)
38) Explain the steps of the Sliding Filament Theory including the following key terms: actin,
myosin, troponin, tropomyosin, calcium, power stroke, and ATP. Underline key terms. (8 points)
39) What are the effects of the following diseases? (3 points)
a. Muscular Dystrophy
b. Fibrodysplasia Ossificans Progressiva
c. Myasthenia Gravis
Answers:
1. B 2. A 3. D 4. C 5. A 6. C 7. D 8. B 9. B 10. C 11. A 12. A 13. B 14. D 15. C 16. A 17. B 18. A 19. D
20. B 21. A 22. B 23. D 24. A 25. D 26. C 27. C 28. B 29. C 30. A 31. B 32. C 33. B 34. A 35. B