BIOL 1175 Lecture Notes - Oligodendrocyte, Neuroglia, Myelin
Document Summary
Allows for movement in the body, it s contractile made of muscle fibers/cells and protein fibers called actin and myosin (interact to produce movement) There are 3 types of muscle tissue in humans: Appearance: long cylindrical cells, multiple nuclei, striated fibers. Location: attached to bone (with tendon) - for voluntary movement. Alternating light and dark bands cause striated or striped appearance. Appearance: spindle-shaped cell with one nucleus, lack striations. Appearance: branched cells with a single nucleus striation with darker striations called intercalated disk between cells. Allows for communication between cells through sensory input, integration of data and motor output. Made of 2 major cell types: neurons and neuroglia (or just glia: nervous tissue - neurons. Made of dendrites, a cell body and an axon. These are long extensions that carry nerve impulses. A collection of cells that support and nourish neurons. Examples: oligodendrocytes: form myelin sheath in brain astrocytes: provide nutrients microglia: engulf bacteria and debris.
