muscle contraction types and all or none law
TRANSCRIPT
![Page 1: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/1.jpg)
Lloyd Dean
Muscle Contraction
![Page 2: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/2.jpg)
AimsBy the end of the lesson you should be able to:
Describe the all or none law of muscle physiology.
State muscle fatigue and oxygen debt in relation to muscle contraction
List the types of muscle contraction
Describe agonists, antagonist, synergists and fixators applied to a range of exercises.
![Page 3: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/3.jpg)
All or None LawTo fire a gun there must be
enough force to pull the trigger
If you pull the trigger harder the bullet does not travel faster!
A contracted muscle receives a nerve impulse either completely or not at all
The action potential (Nerve impulse) is at full strength or not at all
This is the All or None Law!
![Page 4: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/4.jpg)
Muscle Fatigue & Oxygen DebtHow do these both impact the muscle contraction?
If no ATP is available no contraction will take place
If you use more oxygen that is taken in through the lungs then there is a deficit of oxygen
This can make the blood PH level rise, and become acidic (Commonly know as an increase in Lactate acid)
This is a by product of exercises without oxygen, or anaerobically
![Page 5: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/5.jpg)
Antagonistic Pairs
Biceps – Prime mover
Triceps – Antagonistic
This muscle determines the movement of an action –by Contracting
Biceps – Antagonistic
Triceps – Prime Mover
This muscle works with the prime mover but creates an opposing action – by relaxing
![Page 6: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/6.jpg)
Agonist, Antagonists and.......
Synergists FixatorsHelp to steady the
movement
In biceps curl the brachialis helps the action
Assist in stabilising the origin of the agonist to ensure movement occurs
In biceps curl the fixators would
![Page 7: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/7.jpg)
Muscle contraction
Three types
Isometric
Concentric
Eccentric
![Page 8: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/8.jpg)
Isometric Contraction
Muscle stays the same length during Contraction or when the activity is being carried out.
Name a sport/activity where isometric contraction occurs?
![Page 9: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/9.jpg)
Concentric Contraction
This where the muscle shortens when performing an action
Name a sport/activity where Concentric contraction occurs?
![Page 10: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/10.jpg)
Eccentric Contraction
Where the muscle lengthens under tension – ends of the muscle move further away during an action
Name a sport/activity where Eccentric contraction occurs?
![Page 11: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/11.jpg)
![Page 12: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/12.jpg)
Muscle Tone
Muscle tissue never really relaxes and is in constant partial contraction – this gives muscle its shape or tone.
![Page 13: Muscle contraction types and all or none law](https://reader035.vdocument.in/reader035/viewer/2022070318/557984a9d8b42a5f438b51ec/html5/thumbnails/13.jpg)
Review of aimsYou should now be able to:
Describe the all or none law of muscle physiology.
State muscle fatigue and oxygen debt in relation to muscle contraction
List the types of muscle contraction
Describe agonists, antagonist, synergists and fixators applied to a range of exercises.