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Actin and myosin

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The document summarizes the process of muscle contraction via actin and myosin. Calcium ions are released which bind to troponin, displacing tropomyosin and exposing myosin binding sites on actin filaments. Myosin heads attach and change position to slide actin filaments, then detach when ATP binds. Hydrolysis of ATP provides energy to detach myosin heads, and calcium is reabsorbed allowing tropomyosin to reblock binding sites.

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100’s of free ppt’s from www.pptpoint.com library
actin and myosin dr shabeel pn www.hi-dentfinishingschool.blogspot.com
actin
actin troponin
actin troponin tropomyosin
actin troponin tropomyosin
actin troponin tropomyosin myosin binding site
 
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+ Calcium ions are released from the sarcolemma after stimulation from the T system
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+ the calcium ions bind to the troponin and changes its shape
Ca 2+ Ca 2+ Ca 2+ Ca 2+ the calcium ions bind to the troponin and changes its shape
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+ the troponin displaces the tropomyosin and exposes the myosin binding sites
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+ the bulbous heads of the myosin attach to the binding sites on the actin filaments
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+
Ca 2+ Ca 2+ Ca 2+ Ca 2+ the myosin heads change position to achieve a lower energy state and slide the actin filaments past the stationary myosin
Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i
Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i
Ca 2+ Ca 2+ Ca 2+ Ca 2+ ATP binds to the bulbous heads and causes it to become detached A P i P i P i A P i P i P i A P i P i P i
Ca 2+ Ca 2+ Ca 2+ Ca 2+ ATP binds to the bulbous heads and causes it to become detached A P i P i P i A P i P i P i A P i P i P i
Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i hydrolysis of ATP provides the energy to “re-cock” the heads
Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i hydrolysis of ATP provides the energy to “re-cock” the heads
Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i
Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i calcium ions are re-absorbed back into the T system
Ca 2+ A P i P i P i A P i P i P i A P i P i P i calcium ions are re-absorbed back into the T system
Ca 2+ A P i P i P i A P i P i P i A P i P i P i the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites
Ca 2+ A P i P i P i A P i P i P i A P i P i P i the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites
Ca 2+ A P i P i P i A P i P i P i A P i P i P i the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites
Ca 2+ A P i P i P i A P i P i P i A P i P i P i phosphocreatine regenerates ATP
Ca 2+ A P i P i P i A P i P i P i A P i P i P i phosphocreatine regenerates ATP
Ca 2+ A P i P i P i A P i P i P i A P i P i P i phosphocreatine regenerates ATP

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Actin and myosin

  • 1. 100’s of free ppt’s from www.pptpoint.com library
  • 2. actin and myosin dr shabeel pn www.hi-dentfinishingschool.blogspot.com
  • 7. actin troponin tropomyosin myosin binding site
  • 8.  
  • 9. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 10. Ca 2+ Ca 2+ Ca 2+ Ca 2+ Calcium ions are released from the sarcolemma after stimulation from the T system
  • 11. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 12. Ca 2+ Ca 2+ Ca 2+ Ca 2+ the calcium ions bind to the troponin and changes its shape
  • 13. Ca 2+ Ca 2+ Ca 2+ Ca 2+ the calcium ions bind to the troponin and changes its shape
  • 14. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 15. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 16. Ca 2+ Ca 2+ Ca 2+ Ca 2+ the troponin displaces the tropomyosin and exposes the myosin binding sites
  • 17. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 18. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 19. Ca 2+ Ca 2+ Ca 2+ Ca 2+ the bulbous heads of the myosin attach to the binding sites on the actin filaments
  • 20. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 21. Ca 2+ Ca 2+ Ca 2+ Ca 2+
  • 22. Ca 2+ Ca 2+ Ca 2+ Ca 2+ the myosin heads change position to achieve a lower energy state and slide the actin filaments past the stationary myosin
  • 23. Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i
  • 24. Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i
  • 25. Ca 2+ Ca 2+ Ca 2+ Ca 2+ ATP binds to the bulbous heads and causes it to become detached A P i P i P i A P i P i P i A P i P i P i
  • 26. Ca 2+ Ca 2+ Ca 2+ Ca 2+ ATP binds to the bulbous heads and causes it to become detached A P i P i P i A P i P i P i A P i P i P i
  • 27. Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i hydrolysis of ATP provides the energy to “re-cock” the heads
  • 28. Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i hydrolysis of ATP provides the energy to “re-cock” the heads
  • 29. Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i
  • 30. Ca 2+ Ca 2+ Ca 2+ Ca 2+ A P i P i P i A P i P i P i A P i P i P i calcium ions are re-absorbed back into the T system
  • 31. Ca 2+ A P i P i P i A P i P i P i A P i P i P i calcium ions are re-absorbed back into the T system
  • 32. Ca 2+ A P i P i P i A P i P i P i A P i P i P i the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites
  • 33. Ca 2+ A P i P i P i A P i P i P i A P i P i P i the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites
  • 34. Ca 2+ A P i P i P i A P i P i P i A P i P i P i the troponin reverts to its normal shape and the tropomyosin move back to block the myosin binding sites
  • 35. Ca 2+ A P i P i P i A P i P i P i A P i P i P i phosphocreatine regenerates ATP
  • 36. Ca 2+ A P i P i P i A P i P i P i A P i P i P i phosphocreatine regenerates ATP
  • 37. Ca 2+ A P i P i P i A P i P i P i A P i P i P i phosphocreatine regenerates ATP