Which type of sensors in blood vessels identify internal pressure?

The correct answer is that baroreceptors are specialized sensors located in blood vessels that identify internal pressure. They are primarily found in the carotid sinus and the aortic arch, where they monitor changes in blood pressure. When blood pressure rises or falls, baroreceptors detect these changes and send signals to the brain to help regulate heart rate and blood vessel diameter, thereby maintaining homeostasis.

While stretch receptors are involved in detecting changes in the volume of the blood vessels as they expand or contract due to changes in blood flow, it is specifically the baroreceptors that play the critical role in sensing and responding to blood pressure changes. Pain receptors are meant to detect pain stimuli, and chemoreceptors are involved in sensing chemical changes, such as levels of oxygen or carbon dioxide in the blood. Thus, baroreceptors are the specific sensors responsible for identifying internal pressure in blood vessels.