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Thread: HY Concept 86

  1. #1
    tommyk is offline USMLE Advisor
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    HY Concept 86

    Easily one of the most missed because people THOUGHT they knew:

    PIC: HISTO of muscle fiber. Can you do these if arrows are everywhere?

    1) Point to myosin fibers

    2) Point exactly where ATP works/acts in EM.

    3) To what does Ca bind to (answer is diff for smooth and skeletal muscle)

    ANSWER ME, PLEEEAASE! (Well, silently, I cannot actually hear you)

  2. #2
    tommyk is offline USMLE Advisor
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    see

    1) Myosin are the middle lines/area (Look up Histo atlas)

    2) ATP is bound to myosin on the Head

    3) Ca binds to troponin in skeletal muscle and CALMODULIN (which activates MLCK)

    See, isn't it easy to forget? So DON"T!

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