The Muscular System

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bonds of Phosphate tail

ATP is stored in the

ATP

energy

cellular respiration

ATP is created by

Cellular respiration

the breakdown of food molecules and conversion to ATP- using oxygen and glucose

Capillaries

How does oxygen get to the muscles?

RBC with protein hemoglobin

What carries oxygen?

Myoglobin

protein in muscle cells that stores oxygen

Myofibrils

contain the protein filaments actin and myosin

Skeletal Muscle Contraction

Through a series of chemical reactions, the actin and myosin slide past one another, shortening the muscle and pulling on its attachment(bone)

Sliding Filament Theory

The head of a myosin cross bridge can attach to an actin binding site and bend slightly, pulling the actin with it. Then the head releases, straightens and combines with another binding site farther down the actin filament

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