BIO 203 Lecture 14

BIO 203 Lecture 14 - March 13th BIO 203 Calcium induced...

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March 13 th BIO 203 Calcium induced calcium release is specific to cardiac muscle, differentiating feature from skeletal muscle Skeletal muscle membrane potential is –70mV, contractile myocardium is – 90mV, autorhythmic myocardium(SA node cell) is –60mV In skeletal muscle, point where muscle can no longer be shortened, but continues to be contracted, as long as AP’s frequency is less than refractory period of SR Generating tetanic contraction in cardiac muscle is not a good idea, since the cardiac muscle has to shorten in order to eject blood out of the ventricles Table 14-3 need to know everything in that table ECG – electrocardiogram o Set up an Einthoven’s Triangle, left arm to arm, to leg and up again creating a triangle o Limb II (right arm to leg) is preferred because it is parallel with the ventricle o P wave – atrial depolarization, through gap junctions o QRS complex – ventricular depolarization, contraction of ventricles o T wave – ventricular repolarization, muscle relaxation, remove calcium
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This note was uploaded on 04/08/2008 for the course BIO 328 taught by Professor Cabot during the Spring '07 term at SUNY Stony Brook.

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BIO 203 Lecture 14 - March 13th BIO 203 Calcium induced...

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