The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the...
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Transcript of The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the...
![Page 1: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/1.jpg)
The Sliding Filament TheoryThe Sliding Filament Theory
![Page 2: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/2.jpg)
Steps to the Sliding Filament Theory
1. A message originates in the brain and is released to the central nervous system (CNS)
2. The message travels down the spinal cord and then to the peripheral nervous system (PNS)
3. The message travels from the axon branch (pathway) to the axon terminal of the muscle.
![Page 3: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/3.jpg)
Steps 4-6Steps 4-64. The message is carried through the axon
terminal via acetylcholine (Ach) to the sarcolemma of each muscle fibre involved
5. Ach causes calcium (Ca+) to be released
6. Ca+ ions find their way to the attachment sites on troponin (found on actin’s tropomyosin)
![Page 4: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/4.jpg)
Steps 7-9Steps 7-97. Tropomyosin swivels, causing the binding sites
for myosin (on actin) to be exposed
8. Myosin heads attach to the binding sites on actin
9. ATP is broken down by ATPase causing the power stroke
![Page 5: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/5.jpg)
Steps 10 & 11Steps 10 & 1110.Contraction will continue until you decide to
stop. As long as calcium is present, contraction will continue.
11.Once you decide to stop the activation, calcium with withdraw into the sarcoplasmic reticulum. Troponin and tropomyosin will cover the binding sites for myosin, and the muscle will return to a resting state.
![Page 6: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/6.jpg)
Watch this!Watch this!http://www.youtube.com/watch?v=EdHzKYDxrKc
![Page 7: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/7.jpg)
![Page 8: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/8.jpg)
ATP: Adenosine TriphosphateATP: Adenosine Triphosphate
When the nerve impulse is transmitted When the nerve impulse is transmitted to the muscle fiber calcium is releasedto the muscle fiber calcium is released
Adenosine triphosphate (ATP) is the Adenosine triphosphate (ATP) is the energy source that allows for the energy source that allows for the calcium to be releasedcalcium to be released
![Page 9: The Sliding Filament Theory. Steps to the Sliding Filament Theory 1.A message originates in the brain and is released to the central nervous system (CNS)](https://reader036.fdocuments.in/reader036/viewer/2022082816/56649ce65503460f949b395c/html5/thumbnails/9.jpg)
Another animation...Another animation...
http://www.youtube.com/watch?v=WRxsOMenNQM&feature=related