Muscles (1)

Muscles (1) - sarcomeres Skeletal Muscle Structure Skeletal...

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Muscles
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Types of Muscle Smooth - involuntary Skeletal - voluntary Cardiac - involuntary
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Smooth Muscle Involuntary Lines digestive system Lines blood vessels Contracts bladder Contracts uterus Few nuclei, no striations Movements involve many muscles at a time
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Skeletal Muscle Under voluntary control Moves arms, legs, head Allows us to change body position, move Produces most of body heat Many striations, many nuclei Pull on bone
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Structure of Skeletal Muscle Draw figure 37.10 in your notes here. Muscles are made of individual bundles. Each bundle is enclosed by a sarcolemma Within each sarcolemma are many
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Unformatted text preview: sarcomeres Skeletal Muscle Structure Skeletal Muscle (cont.) Each sarcomere is bounded by two Z lines Each sarcomere is made of actin and myosin strands Sliding Filament Theory Basic theory of muscle contraction. Two filaments, actin & myosin, interact within the sarcomere Length of A band doesnt change. I-band and H-zone shorten during contraction. Filaments slide past each other but do not shorten themselves. Cardiac Muscle Found only in heart Striated like skeletal muscle Involuntary like smooth muscle Pushes blood out of the heart...
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Muscles (1) - sarcomeres Skeletal Muscle Structure Skeletal...

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