Objective 7 Flashcards
0
Q
What does the sliding filament model of contraction look like during rest?
A
In a relaxed state, the thin and thick filaments overlap only slightly
1
Q
Explain the sliding filament model of constraction
A
Thin filaments slide past thick filaments so that the actin and myosin filaments overlap to a greater degree
2
Q
What happens to the sliding filament model upon stimulation?
A
Upon stimulation, myosin heads bind to actin and sliding begins
- each myosin head binds and detaches several times during contraction, acting like a ratchet to generate tension and propel the thin filaments to the M line (center of the sacromere)
3
Q
What happens when the binding and sliding occurs throughout all the sarcomeres?
A
The muscle shortens and the H zone disappears
