Bone Lecture 8

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Author:
yassefa
ID:
90016
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Bone Lecture 8
Updated:
2011-06-10 02:46:03
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Bones
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Bones
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  1. Myoglobin
    Oxygen storing protein that only has one protein subunit (hemoglobin has 4)
  2. Motor unit
    A neuron and the muscle fibers that innervate it
  3. Smooth muscle
    involuntary, innervated by the autonomic nervous system, Contain ONE nucleus, intermediate filaments, and thick and thin filaments (but are not organized into sarcomeres)
  4. Epidermis
    Avascular (no blood vessels)
  5. Osteocyte
    Bone cell
  6. Myofibril
    Many sarcomeres positioned end to end
  7. Thin filament
    made of the protein actin
  8. T- tubules
    create a uniform muscle contraction allowing the action potential to spread through the muscle cell more rapidly
  9. Integulmentary system
    SKin, hair, nails, glands, and some nerve endings
  10. Muscle contraction four possible functions
    • 1. Body mov't
    • 2. Stabilization of body position
    • 3. Mov't of substances through the body
    • 4. Generating heat to maintain body temperature
  11. Sarcoplasmic reticulum
    Specialized endoplasmic reticulum that surrounds the muscle cell
  12. Intercalated disc
    Contain gap junction which allow action potential to spread from one cardiac cell to the next via electrical synapses
  13. Bone
    Living tissue that functions to support soft tissue, protect internal organs, assist in body mov't, mineral storage, blood cell production, and energy storage.
  14. Osteoblast
    Bone-forming cell
  15. Tendon
    Connects muscle to bone
  16. Dense bodies
    Small regions of increased density in the sarcoplasm of skeletal muscles to which myofilaments seem to attach
  17. Sarcomere
    The smallest functional unit of skeletal muscle; composed of protein thick and thin filaments
  18. Red bone marrow
    Red blood cell development; spongy bone
  19. intermediate filaments
    Upon contraction pulls dense bodies together
  20. Hypertrophy
    Increase in muscle cell diameter and change in muscle conformation
  21. Synergistic muscles
    Assist the agonist by stabilizing the origin bone or by positioning the insertion bone during the mov't
  22. Dermis
    Vascular connective tissue
  23. Skin
    An organ that functions in thermoregulation, protection, env'tal sensory input, excretion, immunity, blood reservoir, and vitamin D synthesis
  24. Yellow bone marrow
    Contains adipose cells for fat storage; surrounded by compact bone
  25. Sarcolemma
    Modified membrane that wraps several myofibrils together to form a muscle cell or muscle fiber
  26. Ligament
    Connects bone to bone
  27. Thick filament
    Made of the protein myosin
  28. Cartilage
    Flexible, resilient, connective tissue
  29. Osteoclast
    Absorption of bone, as in the formation of canals
  30. Cardiac muscle
    Striated (composed of sarcomeres), contains only ONE nucleus, and is separated from its neighbor by intercalated disc; involuntary, larger and more numerous mitochondria
  31. Three types of muscle tissue
    1. Skeletal muscle

    2. Cardiac muscle

    3. Smooth muscle

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