Sign in to save your progress, vote, and build your own decks.Sign in
The Muscular System Functions
23 cards·by jennybakalov
muscular system functions
body movement by contracting muscles that attach to bones and other structures; body form and
shape; maintain posture; body heat
function of body form and shape of the muscular system
the muscles account for about 1/2 of our body weight
body heat as one of the muscular system functions
muscle contraction takes energy, thus energy being dispersed is heat
2 events that effect muscle movement
myoneural stimulation and muscle contraction
myoneural stimulation
a nerve cell impulse stimulates the muscle cells it is attached to through the neuromuscular
junction
muscle contraction
a neuron releases a chemical, a neurotransmitter, called acetylcholine; this chemical
moves across the gap
resting potential
when the sarcolemma is in its original electrical charge state
ATP (adenosine triphosphate) and phosphocreatinine
a storage form of energy from glucose (simple form of sugar)
neurotransmitter
a chemical released by neurons
acetylcholine
a neurotransmitter; a chemical released by neurons
muscle fatigue
the result of lactic acid building up in muscles during times of great muscle use
isotonic
means "same tone"
isometric
means "same length"
atrophy
muscles shrinking from disuse
hypertrophy
the enlargement of muscle fibers due to the addition of enzymes and proteins from heavy
exercise
2 types of muscle contraction
isotonic or isometric
results from regular, moderate exercise and supervised training
improved coordination of muscles needed in an activity and respiration and circulation;
elimination or reduction of excess fat
functions of the skeletal system
support for body structures and shape for the body; protection for the soft and internal
organs; movement of the body
articulations (joints)
join bones together
skeletal maturity
natural bone length growth and skeletal fusion are complete
How many bones are in the human body?
206
osteocytes
microscopic mature bone cells
osteoblasts
primitive embryonic cells