Skeletal Muscle, Characteristics
Voluntary control Striated and multinucleated
Skeletal Muscle, Functions
Allows movement. Influences body shape. Ability to manipulate environment.
Cardiac Muscle, Characteristics
Involantary control striated and uninucleated
Cardiac Muscles, Functions
Pumps blood throughout the body
Smooth Muscles, Characteristics
Involuntary (except diaphragm) not striated and uninucleated
Smooth Muscles, Function
Found in hollow organs and causes peristalsis, BP, pupil size, and erects hair
Long cylindrical muscle cell
Makes up muscle fibers and gives striated appearance. The contractile ORGANELLE of skeletal muscle
Myofilament, Light (I) band (Thin filament)
Myofilament, Dark (A) band (Think filament)
Portion of A band where thick and thin filaments do not overlap (ONLY thick filament)
Bisects I band (from 1 z disc to another z disc = 1 sarcomere)
Transverse (T) Tubule
Indent of sarcolemma at junction of A and I bands
Contractile unit of muscle
Similar to smooth ER. Stores Ca ions amongst other functions.
Covering of individual muscle fibers (plasma membrane)
Cytoplasm of the muscle fiber (cell)
Mitochondria of the muscle cell
Dilated end sacks of the sarcoplasmic reticulum
Thin areolar CT surrounding each cell
Collagenic membrane sheathing bundle of fibers
Dense overcoat of CT around entire muscle
Bundle of muscle fibers (cells)
CT that binds muscle into functional groups
Connects muscle to bone (strong and cordlike)
Connects muscle to muscle or muscle to bone (flat and sheet-like)
Movable point of attachment
Fixed (immovable) point of attachment
Neuromuscular Junction (NMJ)
Found between nerve fibers and muscle cells. A single neuron can stimulate many muscle cells.
Composed of the muscle cell and stimulating neuron.
Gap between the neuron and muscle fiber.