Cross-bridge Cycle

Question 1

At rest, cytoplasmic ATP + ___ = ATPase ATP - ADP and is at a ____ position or energized stage

Answer 1

Head of myosin; cocked

Question 2

In stimulated muscle, ___ and ____ release, myosin binding site is exposed, myosin head binds to actin resulting to ______

Answer 2

AP, Ca2+; cross bridge formation

Question 3

Power stroke cause sacromere to

Answer 3

Shorten

Question 4

No AP, SERCA _____ Ca++ conecentration

Answer 4

Decrease