Muscle and Muscle Tissue

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  1. The 3 function of Muscle Tissue
    • Movement: Internal and external mobility are controlled by muscles, motion, and locomotion are external. Motility, internal (smooth muscle) Everything that the body does requires a muscle contraction
    • Heat Production: All muscle contractions produce and release heat. Body will begin to sweat to maintain homeostasis. body will shiver (tiny muscle contractions) if it gets cold.
    • Posture: Sitting or standing requires muscular contraction of a static/Sustained Nature.
  2. 3 types/characteristics of Muscle
    • Skeletal: Striated Voluntary: Cylindrical Shaped Fibers that are responsible for motion, locomotion, Facial Expressions, posture, etc.
    • Cardiac: Striated Involuntary: Y or H shaped fibers that are formed only in the heart and provide force necessary to pump blood throughout circulatory system. Generates its own stimuli to initiate muscle contraction.
    • Smooth: NonStriated Involuntary: Spindle Shaped fibers that line walls of hollow organs such as blood vessels or digestive tract. Contraction rate is very slow.
  3. Each Muscle consists of bundles called __________ . The bundles contain numerous muscle fibers called _________, each fiber is made up of __________ (actin & Myosin)
    • Fasciculi
    • Myofibrils
    • Myofilaments
  4. The protective connective tissue covreing each muscle fiber (cell) is called? 
  5. Fasciculi (muscle bundle) is encased in a specialized fascia (ct) known as 
  6. Entire muscle is surrounded by fascia known as___________?
  7. Muscle fiber structure
    • Tendons: Tendon Attaches muscle to bone
    • Aponeurosis: Broad, flat, large tendon that attaches muscle to bone, or another muscle.

    Retinaculum (Retinacula) plural: Bracelet like band that holds tendons in place, found in ankles, knees, and wriest.

    Tendon Sheath: Surrounds the tendon where it crosses multiple joints and serves to protect tendon from abrasion.
  8. The ability of a muscle to shorten forcefully

    a) Exciteability
    b) Contractility
    c) Extensibility
    d) Elasticity
    b) Contractility
  9. Muscle response to stimulation by nerves and hormones.  (Irritability)
    a) Contractility
    b) Exciteability
    c) Extensibility
    d) Elasticity
    b) Exciteability
  10. Ability of the muscle to be stretched to its normal resting position and beyond to a limited degree.
    a) Exciteability
    b) Contractility
    c) Extensibility
    d) Elasticity 
    c) Extensibility
  11. The ability of a muscle to recoil to its original position after it has been stretched.
    a) Contractility
    b) Elasticity
    c) Extensibility
    d) Exciteability
  12. Sarcolemma
    Cell Membrane
  13. Provides the ATP needed for Muscle Contraction
  14. Red pigment Stores oxygen in the muscle tissue
  15. A specialized Endoplasmic Reticulum that stores calcium ions needed for muscle contractions
    Sarcoplasmic Reticulum
  16. Contain multiple nuclei ,Multi Nucleate
    Nuclei Muscle Cells
  17. Actin: Thin protein Filament, Resembles 2 twisted pearl necklaces. Contains 2 types of protein molecules.
    Troponin: calcium from sarcoplasmic reticulum is needed to bind with Troponin to begin contraction.

    Tropomyosin: Troponin signals Tropomyosin to shift positions to reveal binding sites for myosin.
  18. Myosin Heads will bind to the sites on the actin filament exposed when_________ shifts into position. A ratcheting effect takes place with the myosin heads pulling along the exposed actin sites to shorten muscle. ATP required for the action to occur.
  19. Types of Skeletal Muscle fibers are 
    • Slow Twitch (high oxidative fibers)
    • Intermediate twitch
    • Fast Twitch (Low oxidative fibers) 
Card Set:
Muscle and Muscle Tissue
2012-07-18 10:20:13
muscle tissue anatomy

Massage class
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