How does the autonomic nervous system regulate heart rate and blood pressure in the human body?
Answer 1
Tara Hale
The autonomic nervous system (ANS) regulates heart rate and blood pressure through its two branches: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system increases heart rate and blood pressure by releasing norepinephrine, which stimulates the heart and constricts blood vessels. Conversely, the parasympathetic nervous system decreases heart rate and blood pressure by releasing acetylcholine, which slows the heart and dilates blood vessels. These systems work together to maintain homeostasis and respond to stress or relaxation.
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