Muscle microstructure and contraction Flashcards
what are Muscle types
Smooth
Cardiac
Skeletal
what is smooth muscle controlled by
is under involuntary control from the autonomic nervous system
control of cardiac
muscle can contract autonomously, but is under the influence of the autonomic nervous system and circulating chemicals
control of skeletal
Skeletal muscles are under voluntary control, usually attached to bones and contract to bring about movement
what is a fusiform
larger in the middle and tapered at the end
what are pennate muscles
where muscle fibres are placed at angles to the tendon
unipennate
same direction from the tendon
bipennate
2 direction from the tendons
multipennate
multiple tendons and multiple fibres
what is a Fascicles
– bundles of muscle fibres
what is a fascicle made up of
myofibre –> myofibril –> myofilament
how many connective tissues are muscles made up of
3
what does the epimysium made up of
muscle fibre
what are muscle fascicle bounded by
perimysium
what do endomysium sorround
muscle fibre
what is a sacrolemma
the plasma membrane covering myofibres
what is the cytoplasm in the muscle fibre
sacroplasm
what does the sacroplasm contain
myoglobin and mitochondria
sarcoplasmic reticulum
Network of fluid filled tubules
what makes up a myofibre
myofibrils
what is a sacomere
a repeating unit
a z disk to another
what gives striated (striped) appearance
Light and dark bands
what is the thin filament/light band
actin