TERM 1
Step One
DEFINITION 1
extracellular calcium (Ca++) is needed-SR is too small and
cant store enough Ca++-not enough calcium leads
tohypocalcemia
TERM 2
Step Two
DEFINITION 2
calcium binds to calmodulin and activates MLCK
(myosinlight chain kinase)-no troponin
TERM 3
Step Three
DEFINITION 3
Myosin Light Chain Kinase (MLCK) enhances myosin ATPase
activity byphosphorylating light protein chains near the
myosin head.
TERM 4
Step Four
DEFINITION 4
Calcium and calmodulin and MLCK activate myosin heads-
attaches Pi
TERM 5
Step Five
DEFINITION 5
cross bridges form with actin( light protein chains on myosin
head are phosphorylated to allow this binding)
