The ability to sense stimuli arising within the body regarding position, motion, and equilibrium. Even if a person is blindfolded, he or she knows through proprioception if an arm is above the head or hanging by the side of the body.
Proprioreceptors are found in numerous places such as blood vessels and intestines. they respond to stretch and pressure stimuli.
proprioreceptors
baroreceptors,chemoreceptors,georeceptors,hygroreceptors,phonoreceptors, photoreceptors,proprioreceptors,tectilereceptors,thermoreceptors
The truth is that nobody really knows what causes the increase of ventilaion in exercise and keeps it close to metabolic rate. CO2 is a powerful stimulator of breathing and an increase of CO2 is produced by the body in exercise. This increase however is only found in the venous circulation where there are no chemoreceptors to detect it. All of the know chemoreceptors (aortic, carotid and central chemoreceptors) are found in the arterial side where there is relativly no fluctuation in the partial pressure of CO2. Furthermore, when the chemoreceptors are denervated breathing can still increase as normal. Other possible candidates that are involved in increasing breathing are, muscle chemoreceptors, efferencekopie, proprioreceptors, catecholamines, potassium levels...but all are either unlikley to be a cause or are impossible to measure (e.g. efferencekopie). So the textbooks will tell you that ventilation remains close to metabolic rate, but they dont say (beacuse they dont know) how it is kept close to metabolic rate. For further information on this look at works by Mike Parkes (university of Birmingham, united kingdom).
Proprioceptive centres are located in your muscles and the joints. They provide you with the sense of position of various parts of the body. Together with the input from the vestibulocochlear apparatus, you get orientation of your body position in the space.