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6 Cards in this Set

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Do myosin Heads bind randomly to sites on the actins?
There are specific sites on the actin chain to where myosin head binds. They are called myosin binding sights.
Mysin are protected by?
Troponin sights are protected by a protein called troponin
Location of Troponin?
The protein Troponin is located on the actin filament and covers the sights where myosin binds to.
During muscle relaxation what happens?
During muscle relaxation the binding sites for the myasin heads located on the actin filament is protedted by the troponin.
During muscle contraction what happens?
Calcium is released and binds to Troponin thus, uncovering the binding sight of Myosin. Now the Myosin head can bind to actin causing contraction of the muscle.
How Does ATP Help the interaction of myosin troponin and actin.
The interaction requires ATP. the phosphate is used as an energy source for the myosin head to bind to actin