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Muscle Tissue

Kristina Redd Histology MED 2017 Englisch 61 Karten

Muscle Tissue

Karten in diesem Stapel (61)

  1. 1What is the main function of muscle tissue?Contraction to generate motion (muscle must span a joint to achieve this)
  2. 2What does sarco- refer to?"muscle component"
  3. 3What does myo- refer to?"muscle component"
  4. 4Describe the activity of skeletal muscle.Strong, quick discontinuous voluntary contractions
  5. 5Describe the activity of cardiac muscle.strong, quick continuous involuntary contraction
  6. 6Describe the activity of smooth muscle.Weak, slow involuntary contraction
  7. 7How do skeletal muscle fibers develop?myoblasts --> fusion of myoblasts --> formation of muscle fiberHow do skeletal muscle fibers develop?
  8. 8_______ cells are the source of muscle regeneration after injury.Satellite
  9. 9_______ fuse to form a skeletal muscle fiber.Myoblasts
  10. 10Myofibrils contain microfilaments that contain ____ and ____ .actin, myosin
  11. 11What type of filament is actin: thin or thick?thin
  12. 12What type of filament is myosin: thin or thick?thick
  13. 13A Z line to Z line makes up a _____ .sarcomere
  14. 14____ band is made up of all myosin and a small amount of actin.A band
  15. 15Why does the A band have a dark band and a density that causes a darkness to the stain?High concentration of myosin
  16. 16This band is made up of all actin, which makes its stain light.I band
  17. 17This line is a density of protein that actin binds to on the A band. It's a scaffolding of the entire muscle fiber.Z line
  18. 18True/False: The Z line changes during contraction.False.
    During contraction, the Z line pretty much doesn't change.
  19. 19Coined as the leverage point of the entire muscle.Z line
  20. 20During contraction, a repetition binding-movement-release cycles between the ____ heads and ____ filaments occurs.myosin head
    actin filaments
  21. 21What ion plays a significant role in activation?Ca2+
  22. 22Where are calcium sacs stored in the muscle?sarcoplasmic reticulum
  23. 23What is a triad and what does it control?Special internal membrane system that controls muscle contraction by regulating calcium release.
  24. 24What are invaginations of the sarcolemma (plasma membrane) or a membrane-enclosed tube that goes down into the cell hundreds of times within a muscle cell?T-tubules
  25. 25Where do T-tubules occur in mammalian skeletal muscle?A/I junction
  26. 26What do t-tubules form with two terminal cisternae of the sarcoplasmic reticulum?triads
  27. 27How do triads at each A/I junction coordinate an impulse?Sarcomeres (Z line to Z line) must contract or relax at the same time
  28. 28How does an impulse run down the neuromuscular junction?1. Nerve impulse --> Ach released into synaptic cleft --> Ach binds to Ach receptor on sarcolemma of motor end plate --> triggering of muscle impulse
    2. impulse spreads from sarcolemma to T-tubules --> Ca released from terminal cisternae of sarcoplasmic reticulum
  29. 29Describe skeletal muscle: fibers? nuclei? fiber innervation?long, syncytial fibers
    peripheral nuclei
    fibers don't branch
    each fiber is innervated
  30. 30Describe cardiac muscle: fibers? nuclei? fiber innervation?cells attached end-to-end to form fibers
    central nuclei
    fibers branch
    no innervation (stimulus spreads from cell-to-cell via Purkinje fiber coordination)
  31. 31Where do T-tubules run in cardiac muscles?T-tubules run at Z-lines
  32. 32What is the difference in cardiac muscle t-tubules and muscle cells' t-tubules?Cardiac muscle's t-tubule is a diad instead of a triad like the muscle cell.
  33. 33____ _____ are modified cardiac myocytes interconnected by gap junctions (electrical synapses).Purkinje fibers
  34. 34Where can smooth muscle be found?Found in larger blood vessels, the GI system, ureter, bladder, reproductive systems and many other locations
  35. 35What type of muscle Controls peristaltic motions of tubular structures?smooth muscle
  36. 36Which part of a muscle cell is responsible for contraction?myofibrils
  37. 37The portion of the muscle cell that surrounds each muscle fiber by a small amount of connective tissue created by fibroblasts.Endomysium
  38. 38What provides nutrition to a muscle cell?capillaries
  39. 39This layer of the muscle cell surrounds the whole muscle.epimysium
  40. 40This layer of the muscle cell surrounds fascicles and bundles of muscle fibers.perimysium
  41. 41Where is the nucleus in a muscle cell?The nucleus is located at the cell's periphery (pushed off to the side).
  42. 42This layer of the muscle cell separates muscle fibers.Endomysium
  43. 43What functions as the cell boundary in the muscle cell?cell boundary
  44. 44In what layer do collagen fibers exist in a muscle cell?epimysium
  45. 45Identify the type of muscle tissue and indicate the stair-steps.Cardiac muscle tissue
    &
    intercalated disks    Identify the type of muscle tissue and indicate the stair-steps.
  46. 46Identify this muscle type and types of sections.Skeletal muscle tissue w/ striations at longitudinal and cross sectionsIdentify this muscle type and types of sections.
  47. 47Identify the missing parts of this muscle cell.Identify the missing parts of this muscle cell.Identify the missing parts of this muscle cell.
  48. 48Identify the parts of the muscle fiber.Identify the parts of the muscle fiber.Identify the parts of the muscle fiber.
  49. 49Identify the organization of a skeletal muscle: epimysium, perimysium, endomysium, blood vessels, and capillaries.Identify the organization of a skeletal muscle: epimysium, perimysium, endomysium, blood vessels, and capillaries.Identify the organization of a skeletal muscle: epimysium, perimysium, endomysium, blood vessels, and capillaries.
  50. 50Identify the organization of a skeletal muscle.Identify the organization of a skeletal muscle.Identify the organization of a skeletal muscle.
  51. 51Identify myofibril, nucleus, sarcomere, connective tissue, and fibroblast.Identify myofibril, nucleus, sarcomere, connective tissue, and fibroblast.Identify myofibril, nucleus, sarcomere, connective tissue, and fibroblast.
  52. 52Identify.Identify.Identify.
  53. 53These indicate changes in band widths during contraction. Find contracted, rest length, and stretched.These indicate changes in band widths during contraction. Find contracted, rest length, and stretched.These indicate changes in band widths during contraction. Find contracted, rest length, and stretched.
  54. 54What does this picture indicate and in what type of muscle tissue?Muscle cell with motor end plates (arrows)
    demonstrated by silver impregnation.    What does this picture indicate and in what type of muscle tissue?
  55. 55Identify these parts of a skeletal muscle.Identify these parts of a skeletal muscle.Identify these parts of a skeletal muscle.
  56. 56Identify parts of the neuromuscular junction.Identify parts of the neuromuscular junction.Identify parts of the neuromuscular junction.
  57. 57Identify the parts of a cardiac muscle t-tubule system.Identify the parts of a cardiac muscle t-tubule system.Identify the parts of a cardiac muscle t-tubule system.
  58. 58—
  59. 59Name the parts of a smooth muscle contraction.Name the parts of a smooth muscle contraction.Name the parts of a smooth muscle contraction.
  60. 60Name the parts of the cardiac muscle associated with intercalated disks.Name the parts of the cardiac muscle associated with intercalated disks.Name the parts of the cardiac muscle associated with intercalated disks.
  61. 61Identify this tissue.Cardiac muscleIdentify this tissue.

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Beschreibung
MED 2017
Erstellt von
Kristina Redd
Aufrufe
227
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