Term
muscles. ready?
ok
order them |
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Definition
| muscle, muscle fibers, fiber(cell), myofybril |
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| section of the myofiber is called a |
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what binds to what
and what e- level is it at |
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Definition
ATP binds to the myosin head
it is in a lower energy state |
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| until an elephant attacks and !!! |
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Definition
| the ATP is converted to ADP and the myosin head stretches in a high energy conformation |
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| this is when the myosin head |
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| connects with the actin and then the ADP and P reslease and the myosin snaps back into relaxed phase but pulls the actin closer |
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| ATP joins again with the myosin head |
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| contraction and relaxation is regulated |
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| by Ca+ and regulatiory protiens |
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| tropomyosin covers the myosin binding sites on actin |
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| what causes the tropomyosin to block the binding sites |
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| Ca+ binds to tropomyosin and allows for contraction to begin because it shifts the tropomyosin so the heads can bond |
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| in the sarcoplasmic recticulum |
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| ca+ sends a signal to axon to releace NT (ach) and that goes to the receptors which sends a signal down the plasma membrane to the t tubule which runs through the SR and the SR releases the Ca+ that bonds to the troponin in the tropomyosin on the actin. |
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| contraction of a fiber occurs |
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| can be attached to more than one fiber; different neurons control different amounts of fibers |
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| the summation and high frequency of AP's |
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types of skeletal
oxydative |
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| glycolysis not as many blood vessels, white, mitochondria |
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tension is 3 times faster than slow, faster rate of ATP hydrolysis, rapid
can be oxy or glyco |
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| develop tension slower, last longer, less SR, always oxydative. |
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| without input from the nervous system |
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| intercalated disks that carry the AP and contractions can last 20 times longer than skeletal |
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| hollow organs, ans, some contract with out as well, slow contractions, DON'T use troponin and tropomyosin, different use of Ca+ |
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