University:
Indiana University South Bend
Course:
ANAT-A 210 | Human Anatomy
Academic year:

2021
Views:

187

Pages:

1
Author:

Rose G

22.06.2020Alice BallMUCCICNUSCLE CONTRACTION CONTRACTIONedited 2N CGitSTRUCTURESkeletan muscueEpimysiummuscle fasciclesgood detailedaccurate notes,well donelspacificBd inSacromereEndomysiumnunearemuscle fibres.gens.SacrolemnaMuscle fubresPerimysiumMUSCLETYPES:VOLUNTARYINVOLUN TARYMUSCLESsmoothMUSCLESmuscleSkeletalcardiac musclesmusclesSKELETALSkeletal muscle is made of bundles and bundves of muscleMUSCLEfulores (muscle cells)character stics; long, cylindrical several nuches.This muscle has many myo fibrils which contain sacromeresfor contractionThese sacromeres contain alternating protein filaments thatslide across each other for contractionThere are two alternating Rilaments; actin + myosine.actin : is then and attach to the z line. (binding site trigged by Ca2+)myosin: is a thick filament all atched to the M une (releasesADP + P1 during contraction)IUSCLEINTRACTIONContra ction is caused by electrical impurses produced from theNervous system to cause an action potentialCa2t is used todothis.as1An electrical impulse is sent tonenromuscular junction tothesite of signal exchange.2The exchangement happ. ens via synaptic bulb which 's connectedwhen thereis enougncalcium surroun ding the alternatingto the muscle fibres.3filaments. the Cazt attaches to actins troponin to dis place actinestropomyosin so the muscle canrelaxwhen the muscue is contracting myosine attaches to actinsbunding site and pulls it along bringing the M+ 2 une close togethermaking the muscle smaller.yosinnas ATP to do this and releases ADP HPI during process-nown as (power strokes