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8263 Physiology

The force of a twitch is less than that in a tetanus, BECAUSE:

AOne action potential does not release sufficient Ca++ to saturate the troponin binding sites
BCa++ reuptake into the sarcoplasmic reticulum is so rapid that there is insufficient time for all the troponin Ca++ -binding sites to be occupied
CCrossbridge cycling is not fast enough to allow expression of the maximum possible force before Ca++ dissociates from troponin
DAll of the above
Physiology
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8269 Physiology

Which of the following represents Weber Fechner Law?

AMagnitude of stimulus strength perceived is approximately propoionate to the log of the intensity of stimulus strength
BMagnitude of stimulus strength perceived is directly propoional to the intensity of stimulus strength
CThreshold of receptor is directly propoional to stimulus strength
DThreshold of receptor is inversely propoional to stimulus strength
Physiology
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