Which Is TRUE Regarding the Regulation of Heart Rate

question 27

Multiple Choice

Which is TRUE regarding the regulation of heart rate?

• A)Stimulation of parasympathetic nerves to the heart causes a slowing of heart rate.
• B)Stimulation of sympathetic nerves to the heart causes an increase in heart rate.
• C)A person whose heart lacks autonomic innervation has a faster heart rate at rest than a person with a normally innervated heart.
• D)The slope of diastolic depolarization in SA node cell action potentials determines the heart rate.
• E)All of the choices are true.

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