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Increases and decreases in your heart rate are determined by the?
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Increases and decreases in your heart rate are determined by the?

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Heart rate is controlled primarily by the autonomic nervous system, with sympathetic stimulation increasing the rate and parasympathetic stimulation decreasing it.
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Answer:

The two branches of the autonomic (involuntary) nervous system control heart rate. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS) are two types of nervous systems (PNS). To increase heart rate, the sympathetic nervous system (SNS) produces hormones (catecholamines epinephrine and norepinephrine).

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