Muscle contraction Flashcards
(4 cards)
1
Q
contraction requires (2)
A
calcium and nrg ATP
2
Q
how does contraction differ for smooth cells
A
no troponin and tropomyosin. 2 cytoplasmic enzyme are responsible for controlling Ca and attaching ATP to myosin head
3
Q
fn of sarcoplasmic reticulum
A
releases stored calcium into sarcoplasm
4
Q
fn of calcium
A
binds to troponin thus tropomyosin moves out of the way to reveal myosin binding sites on actin filament
