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6516639012The entire length of the thick filament going to be referred to as theA-band0
6516641199a proteinasious disczline1
6516647543so the a band of the sarcomere extendst entire lenghth of thethick filament2
6516659736part that extends from the ends of the thick filament to the zdicsI band3
6516660931i band consists all ofthin filament4
6516667597each sarcomere has1 a band 2 i bands 2 z-dics5
6516681828Right in the center of the sarcomere have something called theM-Line6
6516685401Is another proteinnasious discM-Line7
6516688885Is what anchors the thick filament to the center of the sarcomereM-Line8
6516694064the z disc and m line bothanchor the thin filaments to the ends of the sarcomere9
6516736673Extends from the ends of 1 filament over to the begining of the next filamentH-Zone10
6516738196In H zone only havethick filaments11
6516740102i zone only havethin filaments12
6516746395theres one other protien in a sarcomeretitin13
6516748789IT is a really loose moleculetitin14
6516750369titin constists of 30 thousandamino acids15
6516752333Highlyy strechy like a rubber bandtitin16
6516757662If i overstretch a sarcomere it willelastically return to its resting length. (titin)17
6516761737a sarcomere can stretch beyond itsresting legnth and elastically rebound18
6516765391connective titin extends from1 z disc to the next z disc as well19
6516775114thin filament transects thezdisc goes in both direction20
6516780038We can link our sarcomeres toghthera band i band h zone m line21
6516806171In a zdisc the thin filament extendsthis direciton and that direciton22
6516822807we have lots of lots of what in a sarcomerethick filaments23
6516834269there is a what region that overlap between thick and thin filamentsinteractional relationship24
6516838877Each thick filament is surrounded by how many thin filaments625
6516844249again this is a single thickness if you add those up youll notice that there are6 thin filaments surrounding that.26
6516848111Globosin mysoin heads in a sarcoere are radiating out in all diffdirecitions27
6516851677this globular head on this thick filament willradiate out in all diff directions. and attatch to all 6 of the thin filaments.28
6516860539a single thick filament is much more thick then athin filament29
6516865096and this is just 1 single muscle cell im gonna have lots ofmyofibrils30
6516873317proteins themselves arnt shortening rather thin filaments sliding past thick filaments we refer to this as theslight pull mechanism31
6516874686as a result of the thin filament pulling on the thin filament youull knotice now its gonna be theseglobular myosin heads locking onto this actin32
6516889001globular myosin heads locking onto actin form thepower and recover strokes to pull these up33
6516894312sarcomeres are shortening thin filaments are sliding past the thick filamentsslight pull mechanism34
6516904850slight pull mechanism what shortenssarcomeres will shorter all sarcomeres in myofibrils will shortern the myoribril shortens when all the myofibrils shorten in a muscle the muscle shortens35
6516918116What region would you expect to shorten as contraction occursboth i bands the h zone also36
6516941013what lay side by side in a relaxed muscleactin, myosin, and myofilaments37
6516944383in relaxed muscle what are at max widthh band izone38
6516950522during contraction the actin and myosin myofilament interact with theactin slide toward the center of the myosin fliament as a result the sarcomere shortens.39
6516954592In a fully contracted muscle the ends of the actin myofilaments overlap theh zone dissapear and the i band becomes very narrow40
6516980446when muscle relaxes we reomove calsium from thetropoin c41
6516985385when myosin heads can no longer bind to active sitemuscle returns to resting42
6516991932muscle contraciton requires what to shortenatp43
6516994040muscle contractionactin process44
6516995214relaxationpasive process45
6516999552doesnt require atp for it to belinked46
6517003234relaxation block all of themyosin heads from being linked to binding site47
65170403521 single muscle cell gonna have lots ofmyofibrils in it48
6517054954the ends of the actin myofilaments overlap in afully contracted muscle49

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