Notes: Sliding Filament Theory. [Muscle Contraction Physiology]. (1) Muscle Contraction. Sliding Filaments = Muscle Contraction The Basic Steps: 1- Message sent 2- Neurotransmitter 3- Depolarization 4- Calcium + Troponin = Actin Exposed 5- Actin + Myosin (Contraction).
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[Muscle Contraction Physiology]
1- Message sent
4- Calcium + Troponin = Actin Exposed
5- Actin + Myosin (Contraction)
(3) Calcium Ions released from Sarcoplasmic Reticulum
(10) Everything moves back & contraction done!
(4-6) Calcium binds to troponin, tropomyosin moves, actin exposed
(9) Calcium removed by active transport
(7-8) Myosin attaches to actin, Myosin moves actin, ATP released