The activity of the human heart is regulated by the autonomic nervous system. Which of the following statements is correct regarding its effect on heart rate and stroke volume?
Text Solution
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Sympathetic nervous system (fight or flight response) → speeds up body functions.
In heart: it increases heart rate and increases stroke volume by stronger contraction.
Parasympathetic nervous system (rest and digest response) → slows down body functions.
In heart: it decreases heart rate and has little/no effect on stroke volume (mainly slows the pacemaker activity)
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