Anatomy Quiz 2

Card Set Information

Author:
jacwill
ID:
192987
Filename:
Anatomy Quiz 2
Updated:
2013-01-20 20:25:44
Tags:
Points About Muscles
Folders:

Description:
Points About Muscles
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user jacwill on FreezingBlue Flashcards. What would you like to do?


  1. what is principally in charge of our movements?
    muscle tissue, muscle tissue is also responsible for all of our voluntary behavior and a good share of our involuntary behavior
  2. what percentage of our body weight is muscle?
    40%
  3. what are the three types of muscle tissue?
    striated, smooth and cardiac
  4. striated
    • innervated by the peripheral nervous system, voluntary muscle because it is primarily attached to the skeletal structure       
    •    -voluntary     
    •    -fatigues easily
    •    -even at rest there is some tension (muscle tone)
    •    -group of muscle fibers=fasciculi
  5. smooth muscle
    • autonomic nervous system (aka visceral muscle because of location)
    •   -involuntary
    •   -stomach, intestines, blood vessels, bronchial tubes
  6. cardiac muscle
    • ONLY IN THE HEART
    •    -involuntary-but striated
    •    -heart begins to contract in the very early days of embryonic life
    •       -72 beats per min normal>100,000/day
    •       -26,000,000,000 times in 70 years
    •       -pumps 40,951,000 gallons of blood
    •    -DOES NOT FATIGUE
  7. what are the two points of attachment for muscles?
    • origin-fixed point (proximal, closer to center)
    • insertion-structure being acted upon (distal, away from center)

    NOT ALWAYS THE CASE THOUGH

    think in terms of thyrohyoid (reach and pull object down) and hyothyroid (reach and  pull yourself up to the object)
  8. what produces movement?
    muscle contractions, especially for the extremities but less true of postural muscles
  9. how do skeletal muscles generally produce movement?
    by acting on a joint that lies between the origin and insertion of the muscle
  10. contraction of muscle tissue __________
    the distance between the _____ and ______.
    • decreases    
    • origin     
    • insertion
  11. agonist muscles
    muscles that MOVE a structure
  12. antagonist muscles
    muscles that OPPOSE MOVEMENT
  13. synergist muscles
    muscles that STABILIZE structures

What would you like to do?

Home > Flashcards > Print Preview