QS Study


The receptors which are stimulated by pressure or stretch are called baroreceptor. They are special receptors that detect changes in our blood pressure. Their function is to sense pressure changes by responding to change in the tension of the arterial wall.

Baroreceptors are found within the walls of your blood vessels. The aorta and the carotid sinus contain important baroreceptors which constantly monitor blood pressure fluctuations.


(i) Carotid baroreceptor is in the carotid sinus. (Carotid bifurcation)

(ii) Aortic baroreceptor is in the aortic sinus (Wall of aortic arch)

(iii) Others are located at –

  • Wall of Rt & Lt atria, Lt ventricle
  • Pulmonary circulation.

When the baroreceptors were functioning normally the mean arterial pressure remained throughout the day within a narrow range between 85 and 115 mm Hg.

Pressure ranges in between which carotid baroreceptor work: 50- 180 mmHg.

Pressure ranges in between which aortic baroreceptor work: 80 – 210 mmHg.

Pressure buffer system: Because the baroreceptor system opposes either increases or decrease in arterial pressure, it is called a pressure buffer system.

Pressure nerves: The nerves, from the baroreceptor, are called buffer nerves.