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