lec17-15 - potentially reinforced by circulating...

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KIN 205: Chapter 14, Cardiovascular Physiology: E.1.Autonomic control: 1. the contraction of the ventricle is more powerful, 2. contraction and relaxation occur more quickly. Sympathetic terminals are located on striated cardiac cells. The activation of the sympathetic system leads to increased ventricular contractility. • Under sympathetic stimulation : h All the effects of the neurally released norepinephrine on cardiac function are
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Unformatted text preview: potentially reinforced by circulating epinephrine and norepinephrine from the adrenal medulla. Epinephrine and norepinephrine act on the β-adrenergic receptors of autorhythmic cells and striated myocardial cells. h The actions on autorhythmic and contractile cells differ due to the high content of contractile proteins in the striated contractile cells. E.2. Hormonal control:...
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