The principal determinant of heart rate is the baroreceptor reflex.

Question

Quizplus · Accepted Answer

The baroreceptor reflex is a primary mechanism for regulating heart rate and blood pressure. When blood pressure decreases, the baroreceptors in the walls of the arteries send signals to the cardiovascular center of the brain, which then increases heart rate and contractility to compensate and bring blood pressure back to normal levels. The opposite occurs when blood pressure increases, leading to a decrease in heart rate.

The Principal Determinant of Heart Rate Is the Baroreceptor Reflex