NATS 1610 Chapter Notes - Chapter 6: Rigor Mortis, Tendon Sheath, Myocyte
13 Apr 2014
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Muscular tissue is composed of cells called muscle fibers: contractile (forcefully shorten in response to external stimulation) 3 types of muscle: skeletal: interacts with the skeleton to move the body (most of the body"s muscle tissue) (voluntary, smooth: walls of hollow organs and of tubes (ex. Blood vessels) (involuntary: cardiac: found only in the heart and contracts without stimulation (no control, Skeletal muscle diagram (major muscles in the body) page 105. Origin: is attached to the bone and stays relatively motionless during movement. The other end of the muscle is the insertion. Motor neuron axons: in a nerve leading from spinal chord. Each basic unit of contraction is a sarcomere: each myofibril is divided into bands, dark bands are called z bands (mark the end of each sarcomere, filaments are arranged in overlapping array. Thick filaments: made of bundles of myosin (tail and double head. Thin filaments: two strands of beads (actin, tropomyosin, troponin: everything runs the same way.
