sliding filament theory Flashcards
1
Q
An electrical impulse travels down a nerve fiber
A
1st Step
2
Q
Nerve impulse reaches the end of the nerve & causes it to release acetylcholine
A
2nd Step
3
Q
ACH binds to receptors on the muscle cell membrane & causes the electrical impulse to be transmitted to the muscle cell
A
3rd Step
4
Q
electrical impulse inside the muscle cell causes the release of calcium ions from sarcoplasmic reticulum
A
4th Step
5
Q
Calcium ions bind to troponin causing it to rotate
A
5th Step
6
Q
Rotation of troponin move tropomyosin off the myosin binding site on actin
A
6th Step
7
Q
Myosin head binds the myosin binding domain of actin
A
7th Step
8
Q
Myosin bends in 2 places, releasing ADP & pulling on the thin filament
A
8th Step
9
Q
The Z-lines are pulled closer together & the A-band shrinks
A
9th Step
