muscular system Flashcards
(32 cards)
THREE TYPES OF MUSCLE TISSUE IN BODY
CARDIAC SMOOTH SKELETAL
what muscle appears striped or striated
cardiac
involuntary muscle found in digestive tact, blood vessels, bladder, airways and uterus
smooth
voluntary muscle, Appears markedly striated when examined with a microscope.
skeletal muscle
ATTACH MUSCLE TO BONES
tendons
remains STATIONARY or FIXED when movement at the joint occurs
origin
point of attachment to the bone that MOVES with contractions
insertion
small synovial-lined sacs containing small amount of synovial fluid
bursae
basic funtcional contractile unit is called
sarcomere
muscle whose contraction is mainly responsible for producing a given movement
prime mover
muscle whose contractions help the prime mover produce a given movement
synergist
muscle whose actions oppose the action of the prime mover, helps to return muscle to original position
Antagonist
muscle contraction enables us to maintain body position
Tonic Contraction
body temp below normal
hypothermia
elevated body temp
fever
contraction without the adequate amount of oxygen
Lactic Acid
METABOLIC EFFORT REQUIRED TO BURN EXCESS LACTIC ACID THAT MAY ACCUMULATE DURING PROLONGED PERIODS OF EXERCISE.
OXYGEN DEBT
REQUIRED BEFORE A MUSCLE CAN SHORTEN AND PRODUCE MOVEMENT
NERVE IMPULSE
NERVE CELL THAT TRANSMITS AN IMPULSE TO A MUSCLE, CAUSING CONTRACTION.
MOTOR NEURON
types of muscle contraction
twitch
isotonic
isometric
quick, jerky responses to a stimulus
twitch contractions
produces movement muscle changes length
isotonic contraction
increase tension of the muscle but does not change the length of the muscle
isometric contractions
prolonged inactivity
atrophy