muscle tissue and organization Flashcards
what types of tissues are muscles made of
muscle, epithelial, nervous and connective
skeletal muscles
those muscles attached to bones and are easily seen on the bodys exterior
smooth muscle
essential for propelling materials through our internal tubes
cardiac muscle
found only in the walls of the hear, pumps blood
all muscles are…
excitable (respond to electrical stimuli)
Contractile (contracts to move bones or propel materials inside the body)
Extensible (capable of extending when opposite muscles attach)
what is another name for skeletal muscle cells
muscle fibers
Skeletal muscle functions
body movement
maintain posture
generate heat for temperature control
promote storage and movement of materials in the body
Support and stabilize body walls
when a tendon forms a thin, flattend sheet
aponeurosis
more stationary attachment when the muscle contracts
origin
more moveable attachment when the muscle contracts
insertion
is there extensive blood and nerve supply in the skeletal muscle
yes, it is used to deliver nutrients and oxygen and to remove wast products
what are skeletal muscles classified as
voluntary (they have voluntary control over them and they are controlled by the somatic nervous system)
efferent
they travel away from the center of activity, which is the central nervous system
motor neurons
atrophy
muscle fibers need to be periodically stimulated to contract. If this does not happen muscles will get smaller and will “atrophy”
hypertrophy
muscles will increase in muscle fiber size in response to exercise, especially i high volume
