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12 OSCILLOSCOPE 2009 - Introduction to the Nerve/Muscle...

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Introduction to the Nerve/Muscle Physiology Labs The digital oscilloscope, EMG, EKG
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Outline A. Importance of potentials in biology B. Recording of electric fields from surface of body: skeletal muscle C. Recordings of electric fields from surface of body: the heart D. The digital oscilloscope a. Sampling b. Triggering
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Why should you be interested in electrical potentials in biology?
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Why should you be interested in electrical potentials in biology? A. They are present across the membranes of all cells. B. They are the basis of nerve impulses that underlie the functioning of the brain and all our senses. EEG C. They are the basis of the contraction of our skeletal muscles. EMG D. They are the basis of the rhythm of the heart and its contraction. EKG E. In short they are a basis of life itself; as physicians care about the function of these critical systems, they are useful in clinical medicine for diagnosis.
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