The Hear1 - sudden decrease in blood pressure • Emotions...

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The Heart Extrinsic Regulation of the Heart Extrinsic regulation refers to nervous and hormonal mechanisms. Sympathetic stimulation increases stroke volume and heart rate; parasympathetic stimulation decreases heart rate. The baroreceptor reflex detects changes in blood pressure and causes a decrease in heart rate and stroke volume in response to a sudden increase in blood pressure or an increase in heart rate and stroke volume in response to a
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Unformatted text preview: sudden decrease in blood pressure. • Emotions influence heart function by increasing sympathetic stimulation of the heart in response to exercise, excitement, anxiety, or anger and by increasing parasympathetic stimulation in response to depression. • Alterations in body fluid levels of carbon dioxide, pH, and ion concentrations, as well as changes in body temperature, influence heart function....
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