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Muscle Contraction Steps Anatomy & Physiology » 05. Powerpoint - Muscular System » muscle_contraction_-_physiology.jpg


47.6 The Release of Ca2+ from the Sarcoplasmic Reticulum Triggers Muscle Contraction When Ca2+ binds to troponin, it exposes actin-myosin binding sites. As long as binding sites and ATP are available, the cycle of actin and myosin interactions continues, and the filaments slide past each other.


Calcitonin Calcium (Ca2+) plays a significant role in both nervous conduction and muscle contraction. It is also necessary for coagulation (clotting) of blood. The blood calcium level is regulated in part by calcitonin, a hormone secreted by the thyroid gland when the blood calcium level rises (Fig. 10.7).


sliding filament model > "steps of cross bridge cycling"


This is a composite of several videos from the YouTube, created for a final project in Digital Storytelling class.

Muscles - Huxley Sliding Filament Theory - Cross Bridge Cycle. Excellent video explains this clearly.

from Mama Natural

How to Make Eggshell Calcium (and Why You'd Want to

How to Make Eggshell Calcium (and Why You'd Want to) - Mama Natural - See more at:


043 The details of Muscle Contraction

▶ The Steps of Muscle Contraction Animation - YouTube Mod 11 ch 20 Sarcomere, M-line, showing Myosin actin and myosin heads in movement. Calcium, ATP