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Vttp 434 Final Questions And Answers Study Guide!!

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VTTP 434 FINAL QUESTIONS AND ANSWERS STUDY GUIDE!!

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VTTP 434 FINAL QUESTIONS AND ANSWERS STUDY
GUIDE!!
thick filaments
Answers:myosin
thin filaments


Answers:actin, troponin, tropomyosin
Myofibril


Answers:the "straws" that make up a muscle cell
muscle fiber


Answers:a single muscle cell
M line


Answers:middle of sarcomere
A band


Answers:dark area-- thick filaments with some thin filament overlapping
I band


Answers:"illuminate band" light can pass through-- thin filaments and z disc only
Z disk


Answers:ends of the sarcomere where thin filaments attach

, H zone


Answers:only myosin
tropomyosin


Answers:"chaperone protein" that blocks actin binding sites to prevent
actin/myosin cross bridge cycling (skeletal muscle) also present in smooth muscle
but not as a chaperone proteing
troponin


Answers:3 binding sites- binds calcium, actin and tropomyosin. moves
tropomyosin out of the way when calcium binds to allow cross bridge cycling
sliding filament theory


Answers:z disc move inward toward m line with multiple cross bridge cycling.
ATP dependent
T tubule


Answers:extension of muscle cell plasma membrane that transmits APs through
muscle fiber
Dihydropyridine receptor


Answers:voltage sensitive receptor along t-tuble-- changes shape when AP is sent
down T tubule to activate ryanidine receptor
Ryanidine receptor


Answers:mechanically gated receptor on the lateral sac-- activated when DHPD
receptors change shape-- release Ca++ into cytosol

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