EC Coupling Flashcards
1
Q
Step 1 of EC Coupling
A
Action potential generated and
propagated along sarcolemma
to T-tubules
2
Q
Step 2
A
Action potential triggers Ca2+
release from sarcoplasmic reticulum
3
Q
Step 3
A
Ca++ bind to troponin; blocking
action of tropomyosin released
4
Q
Step 4
A
contraction via crossbridge
formation; ATP hyrdolysis
5
Q
Step 5
A
Removal of Ca+2 by active
transport back into SR
6
Q
Step 6
A
tropomyosin blockage restored;
contraction ends; Ion pumps will return calcium to the sarcoplasmic
reticulum, troponin and tropomyosin slide back in place,
and contraction stops
