frog twitching[1] - Kelly Lunt MCB 32L 10/23/06 Muscle...

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Kelly Lunt MCB 32L 10/23/06 Muscle Excitability and Contractility I. Introduction Background: Muscles are composed of myofibrils which are made up of thick and thin filaments. Each of these filaments is made up of different proteins. The thin filaments are made up of actin, tropomyosin and troponin. Thick filaments are made up of myosin which contains a long tail region and two tail regions which attaches to the thin filament through a process called cross bridge cycling. This is an ATP powered process. Hypothesis: As the stimulus volts are increased, the amplitude voltage will also increase until it reaches a maximum. A frequency will be reached where the muscle will reach tetanus which means that it the voltage will increase due to summation. The muscle will soon fatigue after twitching constantly and will eventually stop twitching on its own. The muscle has a length where the amplitude voltage is at its maximum, this length is the optimum length for the muscle.
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This note was uploaded on 06/28/2008 for the course MCB 32 taught by Professor Wurmser during the Fall '07 term at University of California, Berkeley.

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frog twitching[1] - Kelly Lunt MCB 32L 10/23/06 Muscle...

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