Understanding the Medulla's Role in Blood Pressure Regulation

The parasympathetic neurons in the medulla respond to increased blood pressure by decreasing the heart rate and vasodilation. This helps to lower blood pressure.

The parasympathetic neurons in the medulla are activated by the baroreceptors, which are located in the aortic arch and carotid sinuses. These baroreceptors sense changes in blood pressure and send signals to the medulla. When blood pressure increases, the baroreceptors send a signal to the medulla, which activates the parasympathetic neurons.

The parasympathetic neurons then release acetylcholine, which binds to receptors on the heart and blood vessels. This causes the heart rate to slow down and the blood vessels to dilate, which lowers blood pressure.