01:119:116 Lecture Notes - Lecture 21: Cytosol, Phosphocreatine, Hydroxylapatite

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Vertebrate skeletal muscle (responsible for the movements of the skeleton) (attached to bones by tendons) tendons are tough cords that are made up of connective tissue: muscle fiber long, cylindrical cell. Striped appearance (i) skeletal muscles are also known as striated muscle: sarcomere- basic unit of contraction, a repeating unit that is comprised of overlapping thin and thick filaments, many sarcomeres in a muscle. 2. there are hundreds of sarcomeres lined up end-to-end a) this is what makes up a myofibril (1) myofibril are the fibers that run lengthwise in a muscle fiber. 5. the thick filaments are centered in the sarcomere they are anchored in the a: figure 50. 26- the structure of skeletal muscle. Beating: high permeability to na ions depolarization (1) action potentials can occur spontaneously. 2. these joints are junctions between 2 or more bones this allows flexibility and movement a: figure 50. 37.

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