Card 14 / 18: The cardiovascular center is responsible for regulating the heart and blood vessels through homeostatic mechanisms. What tone does each component of the cardiovascular system have? What connections does the cardiovascular center invoke to keep these two systems in their resting tone?
Answer:
The heart-based on the resting heart rate-is under parasympathetic tone, and the blood vessels-based on the lack of parasympathetic input-are under sympathetic tone. The vagus nerve contributes to the lowered resting heart rate, whereas the vasomotor nerves maintain the slight constriction of systemic blood vessels.
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