Muscular quiz
triad
- 2 cisternae, along with transverse tubule
myofilaments (both thick and thin)
- arranged in a specific pattern - results in a distinct appearence
muscle fibers
- cells, multi-nucleated, can be up to .5 meters long, only .1 mm thick
cardiac
- involuntary, striated, heart
cisternae
- larger tubules of the sacroplasmic reticulum
thin (actin filament)
- made up of 3 proteins (actin, troponin, tropomy)
Thick (myofilament)
- made up of one protien, myosin
sacrolemma
- membrane around muscle fiber
sacroplasm
- the cytoplasm of a muscle fiber
Skelatal
- voluntary, striated, attached to the bones
sacromere
-functional unit of muscle - z line to next z line
M-line
Middle of H-zone (protein molecules lined up in a row that anchor thick filament in place)
What happens in muscle contraction
When muscles are stimulated to work, the contract and get shorter
myofibrils
are made up of individual strands cslled filaments/myofilaments
A-band
area where both thin and thick filaments exist
I-band
area where there are only thin filaments
Epimysium
connective tissue that forms outer surface of muscle
perimysium
connective tissue that seperates one fascle from another
Endomysuim
connective tissue that seperates one muscle fiber from another
aponenrosis
connects msucle to bone (wide, thick, thin) or connects muscle to muscle
tendon
connects muscle to bones
Smooth
involuntary, walls of blood vessels, some digestive organs
muscle fiber
made of group of structures called myofibrils
fasicle
made up of muscle fibers
muscle
made up of structures called fascles
H-zone
middle of A-band with only thick filaments
z-line
middle of I-band (protein strands that attach thin filaments to each other)
transverse tubule
not a part of the sacroplasmic reticulum
myofibrils
parellel cords of protein
do muscles push or pull
pull
sacroplasmic reticulum
surrounds each myofibril, used for storage of calcium, lattice like network of tiny tubules
fascia
thin, wraps around muscles for support
