Muscular System Flashcards
Skeletal muscles functional characteristics
Contractility - shorten with force
Excitability - respond to a stimulus
Extensibility – stretch
Elasticity - recoil to their original resting
length after they have been stretched
connective tissue that
surrounds the skeletal
muscle
Epimysium check the ppt location
connective tissue that
subdivides a whole
muscle cell
Perimysium
(fascicle) -
bundles
Faciculi
each
fascicle is then
subdivided by a loose
connective tissue
Endomysium
cell
membrane of the muscle fiber
Sarcolemma - check the ppt location
connects
sarcolemma to the
sarcoplasmic reticulum
Transverse tubules
(T-tubules) check the location ppt
specialized organelle in
muscle cells
Sarcoplasmic reticulum
Manubrium upper part of sternum in sksleatal sysytem
yes
Physiology of Contraction check ppt
Actin – thin
filaments
Myosin – thick
filaments
Z-lines – actin
attached;
sarcomere end
M-line – holds
thick filaments
are
small and spindle shapedare
small and spindle shaped
Smooth muscle
What theory explains muscle contraction, starting with nerve impulses that trigger calcium ion release, leading to the binding of calcium to troponin, displacement of tropomyosin, and exposure of myosin binding sites for contraction?
Sliding Filament theory
The sliding filament theory describes the process of muscle contraction, where actin and myosin filaments slide past each other, powered by ATP, resulting in the shortening of the muscle fiber.
limbs
move in a circle
Circumduction
Pronation and Supination
rotation
Describe what is abduction and adduction
Abduction – away from the
median
Adduction – towards the
median
