Muscular System Quiz #1

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Author:
bbergeron
ID:
121957
Filename:
Muscular System Quiz #1
Updated:
2011-12-13 00:05:49
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Anatomy
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Test on 12/09/11
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  1. Name three structure(s) where you would find smooth muscles:
    • Veins
    • Intestine
    • Stomach
  2. Name three structure(s) where you would find skeletal muscles:
    • Biceps
    • Triceps
    • Calves
  3. Name the structure(s) where you would find cardiac muscles:
    The Heart
  4. Name the muscle that is:
    Multinucleate
    Striated
    Voluntary
    Enlongated
    Surrounded and bundled by connective tissue
    Skeletal Muscle
  5. Name the muscle that is:
    Not Striated
    Spindle-Shaped
    Single Nucleus
    Involuntary
    Found mainly in the walls of hollow organs
    Smooth Muscle
  6. Name the muscle that is:
    Striated
    Usually has single nucleus
    Involuntary
    "Branching"
    Cardiac Muscle
  7. The four functions of muscles are:
    • Maintaining Posture
    • Producing Movement
    • Stabilizing Joints
    • Generating Heat
  8. What are the two contractile filaments?
    • Actin
    • Myosin
  9. Sheet-like connective tissue that attaches muscles to structures
    Aponeuroses
  10. Cord-like connective tissue that attaches muscles to structures
    Tendon
  11. What is the smallest contractile unit of mucle?
    Sacomere
  12. What is the name of the thin membrane that is ACH binding site?
    Sacolemma
  13. Connective tissue surrounding a fascicle
    Perimysium
  14. Connective tissue ensheathing the entire muscle
    Epimysium
  15. A muscle cell
    Fiber
  16. Name of point where nerve and muscle connect.
    Neuromuscular junction
  17. Name of the structure inside the muscle that holds Ca+.
    Sarcoplasmic reticulum
  18. A contraction in which:
    Myofilaments are able to slide past each other during contractions
    The muscle shortens
    Isotonic
  19. A contraction in which:
    Tension in the muscles increases
    The muscle is unable t o shorten
    Isometric
  20. What respone is:
    Single, brief contraction
    Not a normal muscle function
    Twitch
  21. What response is:
    One contraction immediately folled by another
    Muscle do not completely return to a resting state
    Tetanus
  22. When a muscle is fatigued....
    it is unable to contract
  23. Common reason for muscle fatigue is....
    Oxygen debt
  24. Oxygen is required to...
    get rid of accumulated lactic acid
  25. Increasing acidity (from lactic acid) and lack of ATP causes...
    the muscle to contract less
  26. Muscles uses stored what for energy?
    ATP
  27. ATP is broken to...
    release energy
  28. How much of ATP is stored by muscles?
    4-6 seconds worth
  29. A response in which:
    No evidence of relaxation before the follings contractions
    The result is a sustained muscle contraction
    Fused (complete) tetanus
  30. A response in which:
    Some relaxation occurs between contractions
    The results are summed
    Unfused (incomplete) tetanus
  31. Different degress of skeletal muscle shortening
    Graded Responses
  32. Sodium rushing into the cell generates -- ------ --------- in which once muscle contraction is started cannot be stopped.
    an action potential
  33. Chemical released by nerve upon arrival of nerve impulse
    Neurotransmitter
  34. What is the neurotransmitter for skeletal muscle?
    Acetylcholine (ACh)
  35. One neuron in which muscle cells are stimulated by
    Motor Unit
  36. Ability to receive and respond to a stimulus
    Irritability
  37. Ability to shorten when an adequate stimulus is received
    Contractility
  38. Name of connective tissue that surrounds a single muscle fiber.
    Endomysium
  39. The part of the muscle a doctor taps on with the little hammer
    Tendon
  40. What is the space between the nerve and muscle?
    Synaptic Cleft
  41. A discrete bundle of muscle cells
    Fascicle
  42. Plasma membrane of the muscle cell
    Sarcolemma
  43. A long fulamentous organelle found within muscle cells that has a banded appearance
    Myofibril
  44. Actin- or myosin- containing structure
    Myofilaments
  45. 8 steps of a skeletal muscle contraction:
    1. Nerve impluse arrives at neuromuscular junction
    2. ACh is released into the synaptic cleft where it binds to receptors on the sarcolemma of the muscle
    3. ACh binding causes Na+ (sodium) to rapidly enter the muscle, building up a positive electrical charge called an action potential
    4. When enough Na+ has entered, the threshold is reached and the action potential spreads down the length of the muscle
    5. Electric impluse causes Ca+ (calcium) to be released by the sarcoplasmic reticulum (SR)
    6. Ca+ binds to actin, exposing binding sites for myosin to attach to
    7. Myosin uses ATP to extend myosin heads to the actin filament, causing a link between the 2 called cross bridge
    8. Myosin heads are flexed forward, causing a shortening of the sarcomere and bringing about a muscle contraction

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