An increase in parasympathetic outflow to the heart results in
A)an increase in HR.
B)a decrease in HR.
C)a small increase in arterial blood pressure.
D)a small increase in arterial blood pressure followed by an increase in HR.

Question

Quizplus · Accepted Answer

Parasympathetic outflow to the heart is responsible for slowing down heart rate, so an increase in parasympathetic outflow would result in a decrease in heart rate. Arterial blood pressure may decrease slightly due to the decreased cardiac output, but there would not be any significant increase in blood pressure or subsequent increase in heart rate as seen in choices C and D.

An Increase in Parasympathetic Outflow to the Heart Results in