Your SlideShare is downloading. ×
  • Like
Ch1 (3 18)
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Ch1 (3 18)

  • 512 views
Published

 

Published in Technology , Sports
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
512
On SlideShare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
35
Comments
0
Likes
2

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. 1 C H A P T E R Muscle Physiology Gary R. Hunter
  • 2. Chapter Outline  Skeletal muscle macrostructure and microstructure  Sliding-filament theory of muscular contraction  Fiber types  Types of muscle action  Force production
  • 3. Three Types of Connective Tissue: Epimysium, Perimysium, and Endomysium
  • 4. A Motor Unit
  • 5. Sectional View of a Muscle Fiber
  • 6. Detailed View of Myosin and Actin Protein Filaments in Muscle
  • 7. T he discharge of an action potential from a motor nerve signals the release of calcium from the sarcoplasmic reticulum into the myofibril, causing tension development in muscle. 
  • 8. Contraction of a Myofibril: Stretched Muscle
  • 9. Contraction of a Myofibril: Partially Contracted Muscle
  • 10. Contraction of a Myofibril: Completely Contracted Muscle
  • 11. C alcium and ATP are necessary for myosin cross-bridge cycling with actin filaments. 
  • 12. T ype II, or fast-twitch, muscle fibers are capable of developing higher forces than Type I, or slow-twitch, muscle fibers— especially at higher velocities of muscle action. 
  • 13. T he number of cross-bridges that are attached to actin filaments at any instant in time dictates the force production of a muscle. 
  • 14. Force-Velocity Curve for Eccentric and Concentric Actions
  • 15. Three Arrangements of Muscle Fibers Fibers parallel to tendon Unipennate muscle Bipennate muscle
  • 16. M any factors may affect rate of cross-bridge cycling and thus force, including neural activation, calcium concentration, myosin ATPase activity, preloading, prestretch, muscle fiber type and ultrastructure, fatigue through a variety of mechanisms, and number of contractile components (myosin and actin) in parallel. 