Muscular Tissue Chapter 7 PDF

# Muscular Tissue ## Choose the best answer 1. According to skeletal muscle, the following is true: a. Muscle cells are termed muscle fiber. b. Muscle bundle represent structural unit. c. Cell membrane is termed sarcomere. d. Sarcoplasm is rich in rough endoplasmic reticulum. 2. Sk...

# Muscular Tissue ## Choose the best answer 1. According to skeletal muscle, the following is true: a. Muscle cells are termed muscle fiber. b. Muscle bundle represent structural unit. c. Cell membrane is termed sarcomere. d. Sarcoplasm is rich in rough endoplasmic reticulum. 2. Skeletal muscle fibers can be found in the following site: a. Heart. b. Tongue and diaphragm. c. The wall of blood vessels. d. Wall of respiratory tract. 3. The connective tissue of skeletal muscle is differentiated into: a. Epimysium which covers the muscle bundles. b. Endomysium which is formed mainly of elastic fibers. c. Perimysium that surrounds each muscle bundles. d. Perimysium that covers the whole muscle. 4. The shape of skeletal muscle is described to be: a. Cylindrical and short. b. Fusiform branched except in face and tongue. c. Fusiform nonbranched except in face and tongue. d. Cylindrical, striated. 5. Nuclei of skeletal muscle fibers are characterized by being: a. Multiple, rounded and peripheral. b. Multiple, oval and peripheral. c. Single, oval and central. d. Single, oval and eccentric. 6. The sarcoplasm of skeletal muscle fibers shows the following: a. Rich in rough endoplasmic reticulum. b. Transverse striations due to alternating dark and light bands. c. Few mitochondria between myofibrils. d. Many longitudinal striations. 7. Microscopic features of skeletal muscle fibers show: a. Thin sarcolemma covered by perimysium. b. Multiple oval central nuclei. c. Acidophilic sarcoplasm with clear striations. d. Transverse striations are due to longitudinal mitochondria. 8. As regards sarcoplasmic reticulum one statement is correct: a. Less developed in skeletal muscle. b. Form a network around the mitochondria. c. Participate in formation of triad tubular system in skeletal muscle. d. Stores K+ ions. 9. Organelles in the sarcoplasm of skeletal muscle fibers include: a. Few mitochondria between myofibrils. b. Few longitudinal myofibrils. c. prominent rough endoplasmic reticulum. d. prominent smooth endoplasmic reticulum. 10. Electron microscopic picture of myofibrils shows: a. Alternating dark and light bands. b. Different bands are beside each other. c. Dark band is called I band. d. Dark band is called H band. 11. The dark A band features include: a. Bisecting dark membrane Z line. b. I line bisecting the dark band. c. Middle pale area called H zone. d. Z line bisecting H zone. 12. As regards H-zone of myofibrils one statement is correct: a. It represents an area in the middle of I band. b. It is bisected by Z line. c. It is bisected by M line. d. It represents an dark area in the middle of A band. 13. The triad tubular system is characterized by: a. Invagination of the sarcolemma to the depth of cytoplasm. b. Invagination of the sarcolemma is at the surface. c. Three sarcoplasmic reticulum. d. common in cardiac muscle. 14. Electron microscopic picture of triad tubular system recruits: a. Two sarcoplasmic reticulum. b. Sarcoplasmic tubules at one side of T tubule. c. Three Sarcoplasmic tubules. d. Single Sarcoplasmic tubule. 15. Light microscopic picture of cardiac muscle fibers shows: a. Branching fibers. b. Large in size. c. Have not striations. d. Fusiform in shape. 16. Ultrastructural features of cardiac muscle fibers include: a. More numerous myofibrils than in skeletal muscles. b. Few mitochondria. c. Diad tubular system. d. Lysosomes are abundant. 17. Smooth muscle fibers are characterized by being: a. Non-striated, involuntary. b. Striated, involuntary, mesodermal in origin. c. Non-striated, voluntary. d. Striated, voluntary, mesodermal in origin. 18. Longitudinal sections of smooth muscle fibers appear as follows: a. Polygonal in shape. b. Cells with fusiform shape. c. Having rounded central nuclei. d. Having peripheral nuclei. 19. Multiple nuclei are found in: a. Cardiac muscle. b. Skeletal muscle. c. Smooth muscle. d. a & b. 20. Smooth muscle is found in all except: a. Respiratory system. b. Digestive system. c. Urinary system. d. Heart. 21. What is the connective tissue covering of a muscle bundle? a. Sarcolemma. b. Endomysium. c. Epimysium. d. Sarcoplasm. e. Perimysium. 22. What is actin? a. Myofilament. b. Myosin. c. Muscle fibers. d. Myofibrils. e. Myocardium. 23. Which of the following is composed of smooth muscle? a. Upper esophagus. b. Heart. c. Tongue. d. Biceps muscle. e. Walls of the visceral organs. 24. Which fiber type is larger in diameter? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 25. Which fiber type is make up fast-twitch muscle? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 26. Which fiber type has more myoglobin? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 27. Which fiber type gets its energy primarily from glycogen? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 28. Which fiber type is seen in skeletal muscle? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 29. What is line that bisects the dark band in muscle? a. A band. b. I band. c. Z line. d. H band. e. M line. 30. What is the outer connective tissue covering of a muscle? a. Epimysium. b. Sarcoplasm. c. Perimysium. d. Sarcolemma. e. Endomysium. 31. What is myosin? a. Muscle fibers. b. Myofibrils. c. Myocardium. d. Myofilament. e. Muscle cell. 32. Where is cardiac muscle found? a. Myofilaments. b. Myosin. c. Muscle fibers. d. Myofibrils. e. Myocardium. 33. What type of muscle has visible cross striations? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 34. What type of muscle is specialized for contraction? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 35. Which fiber type is more resistant to fatigue? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 36. Lance Armstrong is the seven time winner of the Tour de France. The Tour de France is a bicycle race which covers between 3500 to 4000 kilometers. What type of muscle fiber probably predominates in his legs? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 37. What region is made of thin filaments? a. A band. b. I band. c. Z line. d. H band. e. M line. 38. What is the plasma membrane of a muscle cell called? a. Endomysium. b. Sarcolemma. c. Sarcoplasm. d. Perimysium. e. Epimysium. 39. Which of the following is composed of skeletal muscle? a. Tongue. b. Blood vessel. c. Walls of the visceral organs. d. Lower esophagus. e. Heart. 40. What type of muscle is composed of spindle shaped cells? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 41. What type of muscle is always multinucleated? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 42. Which fiber type is smaller in diameter? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 43. Which fiber type fatigues more rapidly? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 44. What is line that bisects the light band in muscle? a. A band. b. I band. c. Z line. d. H band. e. M line. 45. What is the covering of an individual muscle fiber? a. Sarcoplasm. b. Perimysium. c. Endomysium. d. Epimysium. e. Sarcolemma. 46. What are the thick filaments composed of? a. Myofilaments. b. Myosin. c. Muscle fibers. d. Myofibrils. e. Myocardium. 47. What type of muscle contains centrally placed nuclei? a. Smooth muscle. b. Cardiac muscle. c. Skeletal muscle. d. Both "a" and "b". e. "a" "b" and "c". 48. Which fiber type uses more anaerobic metabolism? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 49. What is the dark band in muscle? a. A band. b. I band. c. Z line. d. H band. e. M line. 50. What bisects the H band? a. A band. b. I band. c. Z line. d. E band. e. M line. 51. What type of muscle has intercalated discs? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 52. What is the cytoplasm of a muscle cell? a. Epimysium. b. Sarcolemma. c. Endomysium. d. Sarcoplasm. e. Perimysium. 53. What is another term for muscle cells? a. Myofilaments. b. Myosin. c. Muscle fibers. d. Myofibrils. e. Myocardium. 54. What type of muscle contains actin and myosin? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 55. Which fiber type has a lot of mitochondria? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 56. Which fiber type uses more aerobic metabolism? a. Red fibers. b. White fibers. c. Intermediate fibers. d. All of the above. e. None of the above. 57. What type of muscle contains sarcomeres? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 58. What type of muscle has branching cells? a. Skeletal muscle. b. Cardiac muscle. c. Smooth muscle. d. Both "a" and "b". e. "a" "b" and "c". 59. Which fiber type is seen in smooth muscle? a. Red fibers. c. Intermediate fibers. e. None of the above. b. White fibers. d. All of the above. 60. A sarcomere is defined as the segment from ___ to ___? a. A band. b. I band. c. Z line. d. H band. e. M line. 61. The most prominent component of a skeletal muscle cell is ___? a. mitochondria. b. Golgi complex. c. myoglobin. d. myofilaments. e. glycogen. 62. The thick filaments of skeletal muscle fibers ___? a. consist of both actin and myosin. b. are present in the A band. c. consist of actin. d. are crossed by the Z line. e. are present in the I bands. 63. The contractile element (component) of skeletal muscle is in the ___? a. myofibrils. b. sarcoplasmic reticulum. c. sarcolemma. d. endomysium. e. sarcoplasm. 64. The connective tissue investment seen with the light microscope around an individual muscle fiber of skeletal muscle is ___? a. endomysium. b. epimysium. c. sarcolemma. d. perimysium. e. basal lamina. ## Complete the following 1. ___ is the functional unit of muscle. 2. Triad tubular system is found in ___. 3. ___ is regenerated by pericytes. 4. Multiple oval peripheral nuclei are present in ___. 5. C.T. surrounds muscle bundles is called ___. 6. C.T. surrounds the whole muscle is called ___. 7. C.T. between muscle fibers is called ___. 8. Thick myosin filaments present in ___ band. 9. Thin actin filaments present in ___ band. 10. The pale area in the centre of the dark A band is called ___. 11. Satellite cells act as ___ in skeletal muscles. 12. Inside the muscle fibers, each I band is bisected by a dark line called ___. 13. Between the sarcolemma of skeletal muscle fiber and its basal lamina, there are small cells called ___. 14. The structural unit of myofibril which extends between two successive Z lines is called ___. 15. At the A-I junction, the tubules of SER form dilated rings around the myofibrils forming ___. 16. Cardiac muscle fibers show dark lines that exhibit step-like pattern called ___. 17. The T tubule in skeletal muscle is present at ___. 18. SER in muscular tissue acts as ___. ## Indicate true or false statement. If false, change the identified word to make it true. 1. Muscular tissue originates from endoderm. 2. The structural and functional unit of muscles is muscle fiber. 3. Skeletal and cardiac muscles are striated and voluntary. 4. Skeletal muscles are present in face & lower 1/3 of oesophagus. 5. Perimysium encloses each muscle bundles. 6. Endomysium is surrounding a muscle fiber. 7. Sarcolemma of skeletal muscle is covered by endomysium. 8. Nuclei of skeletal muscle are oval, multiple and peripheral. 9. Transverse striations are due to alternating dark and light bands. 10. H zone exists in the middle of I band. 11. In triad tubular system, transverse T tubule is invagination of sarcoplasm. 12. Nuclei of cardiac muscles are oval multiple and central. 13. Smooth muscles are present in the respiratory system. 14. Regeneration of smooth muscles develops from satellite cells. 15. Cardiac muscle fibers are multinucleated with elongated nuclei. 16. Red muscle fibers contain few mitochondria. 17. The intercalated disc represents the junctional complex between two successive skeletal muscle fibers. 18. Myoglobin is a red pigment related to oxygen supply for the muscle fibers.