31 - Bundle of His and Purkinje fibers - similar action to...

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Sheet1 Page 1 Norepinephrine (NE) through beta-adrenergic receptors, causes the heart rate to increase. SA node - decreases the permeability of SA nodal cells to K+ by accelerating the inactivation of K+ channels that occurs after a AV node - increases the conduction velocity of AV nodal cells, leading to a reduction of AV nodal delay, by enhancing the slow
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Unformatted text preview: Bundle of His and Purkinje fibers - similar action to that occurring in the AV node atrial and ventricular contractile cells - increases contractile strength by enhancing the Ca++ permeability during the plateau p h...
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This note was uploaded on 10/29/2009 for the course NPB NPB 101 taught by Professor Weidner/wingfield during the Fall '08 term at UC Davis.

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