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16 Cards in this Set

  • Front
  • Back
What two proteins deal with skeletal contraction?
actin and myosin
During contraction actin and myosin _____ incrases
overlap
when stretched the actin and myosin _______ is decreased
overlap
this zone is myosin only?
H zone
when a contraction occurs the h zone becomes _____? the z disc moves in _____? and the sarcomere gets______?
narrow,closer,shorter
which protein gets narrow?
actin
which protein never moves/shortens?
myosin
myosin has 2 heads one is for___ the other is for ___?
ATP, binding w/ actin
this proteins head attaches and detaches?
myosin
ATP does what w/ myosin?
it detaches the head
the whole process of actin/mysoin is triggered by?
Ca
Ca is released from the?
terminal cisternae
there are three proteins that make up this?
tropomin
this sits on the myosin binding site?
tropomyosin
calcium binds with?
TnC
Calciums role is to?
change the shape and move troponin out of the way so myosin can attach