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Sliding Filament T

Sliding Filament Theory for Anatomy & Physiology 2

QuestionAnswer
1) Contraction Cycle Begins 1) ATP energizes a myosin head & is converted into ADP+P
2) Active-Site Exposed, Cross-Bridge Formation 2)Calcium ions bond to troponin, removing the blocking action of tropomyosin & exposing the active site. The myosin head attaches to the actin filaments, creating a cross-bridge
3) Myosin Head Pivots (Power Stroke) 3) Energy stored in the myosin head is used to pull the actin filaments towards the M-line. ADP+P are released
4) Detachment 4) As new ATP attaches to the myosin head, the cross bridge detaches
5) Myosin Resets (Return Stroke) 5) Freed myosin head splits into ADP & P. Released energy restocks myosin head to prepare for the next stroke
In which step does calcium ions bond to troponin? In the 2nd step, calcium ions bond to troponin
In which step does freed myosin head split into ADP & P? In the 5th step, freed myosin head split into ADP & P
In which step does the cross bridge detach as new ATP attaches to the myosin head? In the 4th step, the cross bridge detach as new ATP attaches to the myosin head
In which step does ATP energize a myosin head & converted into ADP+P? In the 1st step, ATP energizes a myosin head & is converted into ADP+P
In which step does released energy restocks myosin head to prepare for the next stroke? In the 4th step, released energy restocks myosin head to prepare for the next stroke
In which step is energy stored in the myosin head is used to pull actin filaments towards the M-line? In the 3rd step, energy stored in the myosin head is used to pull actin filaments towards the M-line
Created by: Levi.Willey
 

 



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