PHYSL212 Lecture Notes - Lecture 30: Ventricular Fibrillation, Atrioventricular Node, Nernst Equation
4 Dec 2016
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Physl 212 - lecture #30 - cardiac electrophysiology. Know the pathway of the blood flow in the heart: av node slows down the a. p. You don"t want the atria and the ventricles contracting at the same time. Due to neurotransmitters being released eg. epinephrine and norepinephrine. In heart attack, there is a reduction in blood flow. Atpase pump, most important in the body (cid:1372) (cid:1371) sodium inside (cid:1372) (cid:1373) activity of calcium-sodium channels (cid:1372) (cid:1373) activity of potassium and sodium (cid:1372) ventricular fibrillation. Spread of excitation between cells: gap junctions and connexions allow signals to spread quickly between cells. Allow for synchronous contractions and movement of blood. ***the ion concentration gradients that determine transmembrane potentials are. In: the na+-k+ atpase pump is the most important transporter. 3 na+ out, 2 k+ in active transporter. [na+]inside allows you to drive the 2 transporter (3 na+ in, 1 ca2+ out)
