Z441.muscle

invervated by axons of motor neurons belonging to the somatic division of the nervous system

muscle fibers innervated by a single motor neuron contract stimultaneously

cylinder-shaped cells

smaller bundles of contractile filaments

contractile filaments

connective tissue sheath

sheathed fibrs are grouped together in bundles

connective tissue

dense fibrous connective tissue

sheet of fibrous connective tissue

• striated, less in cylindrical shape compared with skeletal muscle fibers
• have a single nucleus (found in center of the fiber)

• found only in the heart, similar to skeletal muscle (striated)
• exhibits rhythmicity and spontaneity
• junctions between cardiac muscle fibers (called intercalated discs)

fibrous tissue binding bones together or lashing tendons or muscles in place

contractile organ capable of producing movement

fleshy part of a muscle

portion of a muscle having a seperate origin

fibrous tissue securing a muscle to its attachment

expanded tendon for attachment of a flat muscle

fibrous envelopment of muscular structures

protective covering

relatively fixed point of muscle attachment

relatively moveable point of a muscle attachment

movement accomplished by a muscle

to decrease the angle between two bones

increase angle between two bones

increae angle between two bones past the plane of the anatomical position

to raise

to lower

to draw away from midline

draw toward the midline

draw upright

to draw tight

cause to revolve, internal rotation, external rotation

to turn palm of hand upward

turn palm of hand downward

to draw (skin) into wrinkles

regulates the closing of an aperture

to cause to point outward away from the midline

to cause to point inward toward midline

to pull shoulders back

to pull shoulders forward

pattern of distribution of nerve fibers in a tissue or organ

division of NS which innervates skeletal muscle

division of NS which innervates smooth muscle, heart and glands

brief, sustained contraction resulting from high frequency stimulation

progressive failure of muscle to regain its original length following prolonged stimulation

originating within muscle

period of time following stimulation when a second stimulus does not produce a result

chemical, released at nerve ending responsible for producing the effects of nerve stimulation

response of muscle to a single, brief threshold stimulus

stimulus strength at which muscle contraction occurs

multiple motor units invovled in contraction, producing a smooth continuous response

involves the number of motor units invovled in contraction

occurs when stimuli are delivered so frequently that muscle does not completely relax after first stimulus and second contraction is stronger than first

muscle changes in length, but remains constant during contractile period

tension increases, but muscle does not change in length