Unformatted text preview: heart rate. E.4 Autonomic control of Autorhythmic cells: Sympathetic system: Effects on the autorhythmic cells (SA node): Norepinephrine is release by post-ganglionic neurons and exerts its effects via binding to β 1-adrenergic receptors. The activation of β 1-adrenergic receptors results in modulation of several ionic currents, mainly:...
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- Fall '09