9.2 Sliding Filament Model Flashcards
1
Q
Myofibrils are the
A
Organelles consisting of contractile proteins (aka Myofilaments)
2
Q
Thick filaments
A
Myosin
Myosin heads
ATPase
3
Q
Thin filaments
A
Actin
Arranged along Z discs
Troponin/tropomyosin complex
4
Q
Z disc holds
A
The actin (thin filament) in place
5
Q
A-bands
A
Dark spots, dense thick filament (myosin)
6
Q
I-bands
A
Light spots,
Thin filaments (actin)
7
Q
Myosin does what
A
Grabs actin and slides it towards it (shrinking space between Z disc)
8
Q
Space between Z-discs
A
sarcomere (contractile unit of skeletal muscle)
