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TERM 1
Step One
DEFINITION 1
AP - (MEP) -Na+ open channels = depolarization of
membrane
TERM 2
Step Two
DEFINITION 2
Ca++ releases in SR
TERM 3
Step Three
DEFINITION 3
Myosin ATPase = ATP--> (ADP + Pi) myosin head(REQUIRES
ATP)
TERM 4
Step Four
DEFINITION 4
Calcium binds with troponin--->tropomyosin to move
undercover binding sites (actin)
TERM 5
Step Five
DEFINITION 5
Myosin attaches
TERM 6
Step Six
DEFINITION 6
(ADP + Pi) is released and head flexes-this is the ratchet
effect
TERM 7
Step
Seven
DEFINITION 7
ATP to myosin head for release(REQUIRES ATP)
TERM 8
Step Eight
DEFINITION 8
Calcium reuptake into SR(active transport)REQUIRES ATP
TERM 9
Step Nine
DEFINITION 9
repolarization of membrane(active transport --> Na+/K+
pump)REQUIRES ATP
TERM 10
How many times is ATP
required?
DEFINITION 10
Four timesIn steps: 3,7,8, & 9
