Heart rate decreases when the _________ sends impulses to the heart.
vagus nerve
Heart rate decreases when the parasympathetic nervous system sends impulses to the heart. The parasympathetic nervous system is responsible for regulating bodily functions when the body is at rest, such as the heart rate, respiratory rate, digestion, and energy conservation. When the parasympathetic nervous system is activated, it produces a neurotransmitter called acetylcholine, which travels to the heart and reduces the heart rate by decreasing the rate at which the heart’s pacemaker cells generate electrical impulses. The parasympathetic nervous system works in opposition to the sympathetic nervous system, which stimulates the heart rate and increases blood pressure during periods of stress or physical activity.
More Answers:
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