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10 Cards in this Set

  • Front
  • Back
Types of Muscles their locations
Skeletal muscle, moves the skeleton by pulling on tendons that are connected to bones, multiple nuclei (due to multiple myoblasts), stiation, voluntary control
Cardiac muscle, Pumps blood through the heart, involuntary control
Smooth muscle, Found in blood vessels and hollow organs, including the stomach, uterus, and iris.
Functions of skeletal muscle
Maintainance of posture
Support of soft tissue
Regulations of orafices
Maintenance of body temp
Plasma membrane of muscle cells
Cytoplasm of muscle fibers
Bundles of myofilaments
Terminal cisternae
Widened ends of the SR
Transverse tubules
aid in contraction
Two terminal cisternae and the t-tubule between them, joins adjascent SRs
Functional unit of skeletal muscle, Sarcomeres are connected in series to make myofibrils, ~10,000 sarcomeres make a myofibril, each sarcomeres contracts, shortening the length of the entire myofibril
Thin filaments
I Bands/ Lighter striation
contains actin, tropomyosin, and tropomin, tropomyosin blocks the active site on actin (preventing myosin from attachingto actin), tropomin holds tropomyosin in place, calcium binds to tropomin causing dissociation of the troponin-tropomyosin complex